73— KOS A P ISOCAR PA A. Gray 
Rosa pisocarpa : caule erccto, aculeis parvis, rectis, saepe geminis infrastipu- 
laribus ; foliolis 5-7, parvis, oblongis, simpliciter serratis, facie glabris, dorso leviter 
pubescentibus ; rhachi pubescente, baud glandulosa ; stipulis adnatis, baud glandu- 
loso-ciliatis, apice libero parvo ; floribus paucis, corymbosis ; pedunculis nudis ; 
calycis tubo globoso, nuclo ; lobis lanceolatis, simplicibus, apice foliaceis, dorso 
glandulosis ; petalis parvis, rubellis ; stylis liberis, villosis, baud protrusis ; fructu 
parvo, globoso, rubro, pulposo, sepalis erectis persistentibus coronato. 
R. pisocarpa A. Gray in Proc. A iner. Acad. vol. viii. p. 382 (1873). — S. Watson 
in Brewer & Watson, Bot. Calif, vol. i. p. 187 (1876). — Hooker f. in Bot. Mag. 
vol. cxii. t. 6857 (1886). — Koebne, Deutsche Dendrol. p. 295 (1893). — Rebder in 
Bailey, Cycl. Am. Hort. vol. iv. p. 1554 (1902). — C. K. Schneider, III. Handbuch 
Laiibholzk. vol. i. p. 578 (1906). — Piper in Coni rib. U. S. Nat. Herb. vol. xi. p. 335 
{FI. State of IVasliington) (1906). 
Stejn erect, reaching a height of 5-6 feet ; branches bright red-brown in exposure. 
Prickles small, slender, nearly straight, often in pairs at the base of the leaves. 
Leaflets 5-7, small, oblong, simply serrated, glabrous above, thinly pubescent 
beneath ; petioles pubescent, not glandular ; stipules adnate, not gland-ciliated, with 
small, ovate, free tips. Flowers often 3-4, in a corymb; pedicels naked ; bracts ovate- 
lanceolate. Calyx-tube globose, naked ; lobes lanceolate, simple, leaf-pointed, | in. 
long, glandular on the b^ack. Petals small, bright pink. Styles free, villous, not 
protruded. Fruit red, pulpy, globose, i in. diameter, ripening early in September, 
crowned by the erect persistent sepals. 
Rosa pisocarpa is scarcely more than a mountain variety of Rosa 
calif ornica Cham. & Schlecht., from which it differs only in the small 
size of its parts. Its characters, however, have kept constant after 
many years’ cultivation. It was first found in Oregon by Mr. Ehhu 
Hall m 1871. Sir J. D. Hooker and Dr. Asa Gray found it m the 
upper valley of the Sacramento, at an elevation of 4,000-6,000 feet 
above sea-level. A plant was sent to the Royal Gardens, Kew, from 
the Arnold Arboretum by Professor C. S. Sargent. 
225 
