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Catalogue Genus starting with:   A  B  C  D  E  F  G  H  I  J  K  L  M  N  O  P  R  S  T  U  V  W  X  Y  Z 
Searching Genus for R

RATIBIDA(PRAIRIE CONEFLOWER)Family: ASTERACEAE
Formerly included in the genus Rudbeckia. These underutilized natives of the North American prairie have striking flowers, most suited for the border. Drooping ray flowers around an elongated, erect, grayish disk, a bit like the crown of a hat. Moist or dry soils in full sun.

RATIBIDA columniferaSummer2982
75cm  Zone: 3
A drought tolerant species native to the American mid-west and naturalized throughout North America. Elongated cones are surrounded by yellow dropping ray flowers. For a sunny spot in ordinary to dry soil.
Germination Instructions: Easy, warm germinator.
30 seeds  $3.25   

RAZANIA

RAZANIA japonica (Moist Packed) New Early Spring2983
45-60cm  Zone: 5
A rarely offered and very choice Japanese woodland species, named in honor of Ono Ranzan, who has been called "the Japanese Linnaeus". Clusters of exquisite, drooping cup-shaped mauve flowers early in the season. These develop into upright clusters of white berries. Always limited & sells out quickly, so order early.
Germination Instructions: Seed has been moist packed to preserve viability. Cold treatment is required.
20 seeds  $6.00   Sorry...Sold Out

RHODODENDRON(RHODODENDRON)Family: ERICACEAE
A large genus of trees and shrubs, usually evergreen with showy flowers in terminal racemes

For a very helpful article by John Weagle on growing Rhododendron from seed, see:

http://www.atlanticrhodo.org/unique/contents/seed.html

RHODODENDRON brachycarpum var tigerstedtii3029
2.5m  Zone: -42C
Native to Korea, this is one of the hardiest Rhododendron worldwide having survived temperatures of -42C in Finland. The plant has very attractive, tropical-looking dark green, shiny foliage with trusses of white flowers. Variety tigerstedtii has longer leaves, larger white flowers, and exhibits more vigor. Because the Mustila Arboretum in Finland is central to its introduction I quote from them:

"In 1935, a Rhododendron seed batch, originating from the Kongo-San mountains in eastern-central Korea, was received in Arboretum Mustila, in SE Finland. The new material proved to be extremely hardy, but it could not be classified under any known species. In 1970, Nitzelius described and named it Rhododendron brachycarpum subsp. tigerstedtii. This Rhododendron is perhaps the most famous of the plants of the Mustila Arboretum. It was collected in 1930 in Hozan (now Pungsan), North Korea (4049'N, 12659'E, 1200 m), sent to the arboretum by the Japanese forest research institute in Korea, as Rhododendron chrysanthum (Rh. aureum), and described by the Swedish botanist Tor Nitzelius as Rhododendron brachycarpum ssp. tigerstedtii, after the introducer, Dr. C. G. Tigerstedt."

Our seed comes from a direct clone from Arboretum Mustila. The photograph is from their web site.
Germination Instructions: Easy, warm germinator.
30 seeds  $4.25   

RHODODENDRON canadenseSpring to Summer2994
Rhodora30-90cm  Zone: 3
Native to eastern Canada growing in bogs, on wet slopes or rocky summits. A deciduous shrub with terminal clusters of openly campanulate rose, purple or white flowers opening either before or with its leaves. Foliage is blue-green and has distinctive hairy and rolled margins, gray-green beneath. Seed wild collected in Ontario.
Germination Instructions: Easy, warm germinator.
30 seeds  $4.25   

RHODODENDRON carolinianum (Pink Form)Spring3023
Carolina Rhododendron90cm  Zone: 4
A beautiful small species native to the Carolinas and Tennessee and one of the parents of Rhododendron PJM. The light rosey-pink flowers bloom in spring.
Germination Instructions: Easy, warm germinator.
30+ seeds  $4.25   

RHODODENDRON groenlandicumEarly Summer3010
Labrador Tea30-90cm  Zone: 1
(Ledum groenlandicum) A very hardy evergreen shrub, inhabiting cold and arctic regions of the Northern hemisphere growing in moist forests, bogs, or open tundra. The aromatic, glossy, dark-green leaves have rolled margins covered below with orange hairs. White flowers in dense terminal clusters. The leaves can be used to make a palatable herbal tea, rich in vitamin C. Our seed this year was wild collected in the Alberta Rockies.
Germination Instructions: Easy, warm germinator.
50+ seeds  $4.25   

RHODODENDRON schlippenbachii New Spring3011
Japanese Royal Azaleato 240cm  Zone: 4
The species is native to Korea and northeastern China. Considered by some the most handsome of all azaleas when the large, luminous, fragrant pink flowers cover the shrub in May just as the leaves are starting to emerge from their sheaths. Foliage is a beautiful dark green in summer, developing fabulous tones of purple-red in autumn.
Germination Instructions: Easy, warm germinator.
30 seeds  $4.50   

RHUS(SUMAC)Family: ANACARDIACEAE
A genus of over 200 aromatic trees and shrubs native to North America, eastern Asia, Australia and South Africa.

RHUS aromatica New Spring3031
Fragrant Sumac.5 to 1.5m  Zone: 3
Native to eastern and central North America. Fragrant Sumac lives up to its common name and rubbing the leaves or stems produces a lovely, aromatic pungency. And the small plant, although twisting and sprawling, is very appealing; a myriad of tiny yellow early spring flowers are followed by slightly-serrated leaves, then red berries and finally the brilliance of yellow and red fall leaves. It can grow in a wide variety of conditions and tolerates sites with high moisture fluctuations from saturation or flooding in winter and spring to extremely dry and barren, almost desert conditions in summer. It has a great ability to cling to slopes, serving to stabilize the soil with its shallow fibrous root system. Seed wild collected in Ontario.
Germination Instructions: Seed coat is very hard and impermeable and requires puncturing. Then cold treatment required.
20 seeds  $4.25   

RHUS copallinaJuly3034
Mountain, Dwarf or Shining Sumac2-4m  Zone: 4
Native to eastern North America, and very rare in Canada, this is an outstanding species and a personal favorite, with glossy dark green, pinnately-compound foliage turning the showiest of all sumacs in autumn--utterly brilliant maroon and red. Pyramidal panicles of greenish-yellow flowers in late summer are followed by small red drupes. Seed wild collected in Ontario.
Germination Instructions: After some extensive research and testing; we have finally determined that the best way to germinate this species is by doing a boiling-water overnight soak. Germination then occurs within 2 weeks at warm.
20 seeds  $4.25   

RIBES(CURRANT, GOOSEBERRY)Family: GROSSULARIACEAE
A genus of 150 mainly deciduous shrubs, often thorny.

RIBES americanum New Late Spring3727
Wild Black Currant.5-1.5m  Zone: 3
A deciduous shrub native from Alberta east through Nova Scotia in Canada growing from forests to bogs in varied habitats. Clusters of drooping yellowish flowers in spring are followed by edible black berries, without glands or bristles.
Germination Instructions: Cold treatment required.
30 seeds  $4.00   

RIBES hirtellum New Spring 3726
American Gooseberry1m  Zone: 3/4
A shrub native throughout Canada, except BC, growing on rocky shores, riverbanks, wet woods, bogs, and clearings. A delicious edible purplish-black, smooth berry matures in summer.

Cultivated gooseberries are derived from this species and from Ribes uva-crispa. Whereas R. uva-crispa crops have been devastated by American gooseberry mildew, which was accidentally introduced to Europe, R. hirtellum is resistant.
Germination Instructions: Cold treatment required.
30 seeds  $4.00   

RIBES nigrum New 3728
Black Currant1.5m  Zone: 4
A woody shrub native from central to northern Europe and northern Asia where it prefers damp fertile soils and is widely cultivated both commercially and domestically. Bunches of small, glossy black fruit develop along the stems in the summer. The fruit is rich in vitamin C, various other nutrients, phytochemicals and antioxidants.
Germination Instructions: Cold treatment required.
30 seeds  $3.75   

RODGERSIAFamily: SAXIFRAGACEAE
4-6 species of strong growing perennials, related to Astilbe. Conspicuous for their thick, flat-creeping rhizomes and for their handsome, large, tough foliage and white flower panicles produced in summer. These are predominantly bog, waterside and water garden ornamentals, but will thrive in very moist, woodland conditions. The rich-green (or bronze-toned in full sun) umbrella-shaped leaves create a dense wall of foliage. Best naturalized along a woodland margin with other vigorous shade and moisture-loving perennials. Very beautiful at waterside. Plants will not tolerate standing water, but require a fertile, humus-rich site with ample, damp soil. Be sure to allow a generous space for the slow, but steady spreading growth habit.

RODGERSIA pinnata Mid to Late Summer3042
1.2m  Zone: 3
From Yunnan. A showy species with large, dark green, textured and glossy palmate foliage. The flowering inflorescense is a much branched panicle with reddish stems. Flowers variable from white to pink to deep red. Particularly effective planted on the banks of ponds or along streams. Also for the moisture-retentive woodland garden.
Germination Instructions: Easy, warm germinator.
100 seeds  $4.25   

ROSA(ROSE)Family: ROSACEAE
100-150 deciduous shrubs from the temperate and subtropical zones of the Northern Hemisphere.

ROSA blandaJune and July3057
Smooth, or Early Wild Rose1m  Zone: 3
Native to eastern North America growing in rocky places and on gravelly shores. The flowers of this suckering rose are rosy-pink (rarely white). The purplish stems are glabrous and lack prickles with the exception of a few at the base of it's shoots. Bright red hips appear in late summer which remain attractive well into winter, creating one of the best fall-winter fruit display of any rose. Very adaptive, as it can also tolerate wet soils. Seed wild collected in Ontario.
Germination Instructions: Cold treatment required.
25 seeds  $4.00   

ROSA rubrifolia (glauca)Summer3047
Redleaf Rose210cm  Zone: 2
From the mountains of Europe. A fine addition to the shrub or flower border because of its interesting foliage colour; a beautiful coppery or purplish hue. Can be used in groups to great effect. Flower colour will vary with seed grown plants, but are predominantly pink. Hips are round and smooth.
Germination Instructions: Cold treatment required.
25 seeds  $4.00   

RUBUSFamily: ROSACEAE
A large genus of shrubs, usually prickly and bristly with simple flowers followed by edible berries.

RUBUS allegheniensisEarly Summer3078
Mountain Blackberry60-90cm  Zone: 2/3
One of the most common blackberries of north-eastern North America. A thorny, arching shrub with toothed, divided foliage and white flowers in large heads in early summer. These are followed by delicious, juicy, elongated, shiny black berries. Will grow in any soil condition, sun or light shade. Seed wild collected in Ontario.
Germination Instructions: Cold treatment required.
25 seeds  $3.75   

RUBUS canadensis New June-July3725
Canadian or Smooth Blackberry2-3m  Zone: 2/3
Native to eastern Canada, a non-thorny rhizomatous shrub growing in forested habitats, thickets and disturbed sites. White flowers are followed by sweet, edible blackberries.
Germination Instructions: Cold treatment required.
30 seeds  $4.00   

RUBUS chamaemorus New Spring3080
Cloudberry, Bake Apple10-25cm  Zone: 1
Native throughout the northern parts of the Northern Hemisphere, usually growing in bogs. This is a low, very cold-hardy, creeping shrub with large, palmate foliage. White flowers in early summer are followed by delicious, soft, salmon-coloured fruits in late summer to early fall, which are a very important fruit crop in Scandinavia and in Newfoundland. Seed wild collected in Norway.

The ripe fruits are golden-yellow, soft and juicy, and are rich in vitamin C. When eaten fresh, they have a distinctive tart taste. When over-ripe, they have a creamy texture and flavour somewhat like yogurt. They are often made into jams, juices, tarts, and liqueurs.
Germination Instructions: This species is notoriously challenging to germinate. For your information, please cut and paste this article in your browser.

http://article.pubs.nrc-cnrc.gc.ca/RPAS/rpv?hm=HInit&calyLang=eng&journal=cjps&volume=59&afpf=cjps79-010.pdf
25 seeds  $4.25   

RUBUS idaeus var. strigosusEarly Summer3079
Wild Raspberry1-2m
The wild raspberry is a circumpolar species, growing in thickets, clearings and open woods. The fruit ripens in August in Nova Scotia and is delicious fresh or in various jams or jellies. As well, a mild tea can be brewed from the leaves. Wild collected in Ontario.
25 seeds  $3.75   

RUBUS occidentalis3086
Black Raspeberry2-3m  Zone: 4
A delicious berry native to eastern North America, much used for breeding work. The black raspberry is closely related to the red raspberries Rubus idaeus and Rubus strigosus, sharing the distinctively white underside of the leaves and fruit that readily detaches from the carpel, but differing in the ripe fruit being black, and in the stems being more prickly. The black fruit makes them look like blackberries, though this is only superficial, with the taste being unique and not like either the red raspberry or the blackberry. Wild collected in Ontario.
Germination Instructions: Cold treatment required
25 seeds  $4.25   

RUBUS odoratusSummer to Fall3074
Purple-Flowering Raspberry180cm  Zone: 3
Undoubtably the showiest native species in the genus and a thornless member of the Rose family. Native to eastern North America, it grows in thickets and rocky woods. A rambling, suckering shrub with large, lobed maple-leaf like foliage and bristly hairs on the stems. Rich-pink fragrant blooms begin in early summer and continue into autumn, followed by edible berries, resembling raspberries, which can be eaten fresh, or made into jam or wine. This is a very fine shrub for planting under the shade of large trees, as it will tolerate dry shade. Seed wild collected in Ontario.
Germination Instructions: Cold treatment recommended
20 seeds  $4.00   

RUDBECKIA(CONEFLOWER)Family: COMPOSITAE
Natives of North America with daisy-like flowers adorning the garden with bright colour from summer until frost, and beyond. Easy to grow. Sun or light shade in ordinary soil.

RUDBECKIA hirta (Gloriosa Daisy)Summer to Fall3089
30-60cm  Zone: 3
This variation on the black-eyed Susan is a hybrid developed in the 1930's, which resulted in stronger stems, larger flowers and richer colors. Now regarded as "old-fashioned", it was not actually introduced until 1957 by the Burpee Seed Company. Glorious but short-lived, they usually perpetuate by self sowing. Large flower heads in yellow, red, orange and bi-colours.
Germination Instructions: Easy, warm germinator.
50 seeds  $3.00   

RUDBECKIA trilobaSummer to Late Fall3096
Three-Lobed Coneflower60-90cm  Zone: 3
Much-branched plant with clear yellow flowers and a purplish-black raised disk. Tolerant of much more shade than most Rudbeckias (up to a half-day). A deserved replacement for the overused Goldsturm hybrids. Will flower from late summer to freeze up. Highly recommended.
Germination Instructions: Easy, warm germinator.
30 seeds  $3.75   

RUMEX(DOCK, SORREL)Family: POLYGONACEAE
More than 100 perennial species widely distributed in the temperate world, but only a few merit inclusion in the ornamental garden.

RUMEX orbiculatus New Summer3104
Great Water Dock2.5m  Zone: 4
Found on shorelines of lakes and streams, in marshes and wet meadows of northeastern North America. Large, lance-shaped leaves are up to 60cm long. The much-branched flower stems develop through the summer and commonly attain heights of 1 to 2.5m. Small greenish flowers turn pink then reddish-brown. Very decorative, sharply triangular seed pods develop in fall. Leaves often turn a brilliant red in autumn and dried seed stalks frequently remain erect well into winter. Provides a dramatic vertical accent for pond margins or other moist to wet soil. Will self-sow, but is not invasive. Seed wild collected in Ontario.
Germination Instructions: Cold treatment required.
20 seeds  $3.50   

RUMEX sanguineus var. sanguineusSummer3102
Red-Veined Dock30-60cm  Zone: 4
The species is native to Europe and not terribly showy. This variety, however, with strong maroon-red veining on the green leaves is a striking foliage accent for the semi-shaded garden. Cut the insignificant flower stalks when they appear.
Germination Instructions: Easy, warm germinator.
30 seeds  $4.00   

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