APRIL 1 TO MAY 31, 1920. 51 



60288 to 50306— Continued. 



into growth. (Adapted from Bean, Trees and Shrubs Hardy in the British Isles, 

 vol. 1, p. 256.) 



For previous introduction, see S. P. I. No. 40154. 



50290. Betula kexaica W. H. Evans. Betulaceae. Birch. 

 A tree, native to the Alaskan coast from Cook Inlet southward to the head of 



Lynn Canal, 30 to 40 feet high, with ^\idespreading branches. The stout 

 branchlets are marked with red-brown lenticels becoming darker after 2 or 

 three years. The thin, furrowed bark is dark brown or nearly black near the 

 base of the trunk, gra\dsh white or light reddish brown higher up. The leaves 

 are dull dark green above, pale yellow-green below. (Adapted from Sargent, 

 Manual of the Trees of North America, p. 205.) 



50291. EuoNYMus ussuRiENSis Maxim. Celastracese. 



A shrub or small tree with short, thick branches, broadly elliptical leaves, 

 and small flowers with yellow anthers. (Adapted from Bulletin de L' Academic 

 Imperiale des Sciences de St. Fetersbourg, vol. 27, p. 450.) 



50292. Pyracantha crenulata (Don) Roemer. Malacese. 

 (Crataegus crenulata Roxb.) 



Variety rogersiana. 



A very attractive, rapid-growing shrub with an abundance of white flowers 

 in May, followed in October by a profusion of bright-red berries. It is native 

 to the Himalayas and China. (Adapted from The Garden, vol. 78, p. 563.) 



50293. RuBus alleghaniensis Porter. Rosacese. Blackberry, 

 (i?. nigrobaccus Bailey.) 



One of the numerous forms of the cultivated blackberry, often known as 

 Rubus nigrobaccus, but apparently only a more or less stable form of R. alle- 

 ghaniensis. 



50294. Rubus biflorus quinqueplorus Focke. Rosacese. 



A large Aigorous-growing bush with attractive, stout, "whitewashed" 

 stems, 12 to 15 feet in height, and ornamental foliage. This plant produces rich, 

 golden yellow, raspberrylike fruits of pleasant flavor, which may prove of con- 

 siderable value in the hands of the hybridist. (Adapted from The Garden, 

 vol. 76, p. 624.) 



For previous introduction, see S. P. I. No. 42586. 



50295. Rubus coreanus Miquel. Rosaceae. 



An upright-growing Chinese bramble which is self-supporting. The bluish 

 white stems are 7 or more feet in length and are furnished abundantly with 

 handsome pinnate leaves which are about 8 inches long and consist of seven 

 to nine leaflets. The stems are armed mth straight prickles; those on the 

 petioles are hooked. The fruits are small, red to nearly black, and edible. 

 Native to central and western China at altitudes of 6,000 feet. (Adapted 

 from Gardeners' Chronicle, third serks, vol. 51. p. 148.) 



For pre\'ious introduction, see S. P. I. No. 42585. 



50296. Rubus flosculosus Focke. Rosacese. 



A vigorous Chinese shrub, 10 to 15 feet high, with stout, erect, dark purplish 

 brown stems, smooth except for a few spines. The pinnate leaves, smooth 

 above, are covered beneath with a close white felt. The small pink flowers 

 are followed by small, very dark red or black fruit. (Adapted from Bean, 

 Trees and Shrubs Hardy in the British Isles, vol. 2, p. 458. ) 



For previous introduction, see S. P. I. No. 29976. 



