PaRT 6, 1918] ROSACEAE 
Leaflets narrowly elliptic or lance-oblong, usually 9-11, at 
least on the new shoots. 
Plant stout, about 1 m. high; leaflets 2-6 cm. long; 
prickles often 1 cm. long; fruit more than | cm. thick; 
flowers corymbose. 
Plant low and slender, 2-4 dm. high; leaflets 1-3 cm. 
long; prickles less than 5 mm. long; fruit 8-9 mm. 
thick; flowers usually solitary. 
Leaflets thin, usually light-green, glabrous or nearly 
so; leaf-rachis not glandular-hispid. 
Branches densely bristly; leaves very thin. 
Branches not bristly; leaves firmer. 
Leaflets firm, dark-green above, paler and pubescent 
beneath, at least on the veins; leaf-rachis gland- 
ular-hispid. 
Hypanthium decidedly pyriform, or ellipsoid, long-tapering at the 
base. 
Leaflets thin, not pale beneath, elliptic or oval, subsessile. 
Leaflets pale beneath, oblanceolate, distinctly petioluled, the 
cuneate base entire-margined. 
Leaflets 5—7, subcoriaceous. 
Leaflets crenate-serrulate; prickles short and very stout. 
Leaflets sharply and closely serrate; prickles moderately stout. 
Leaflets densely pubescent beneath. 
Leaflets glabrous or puberulent beneath. 
Stipules entire; leaflets sessile. 
Stipules copiously glandular-dentate; 
luled. 
Hypanthium and pedicels glabrous. 
Leaflets decidedly pubescent or puberulent beneath. 
Leaflets firm; stem densely bristly. 
Leaflets thin; stem unarmed or only the young shoots sparingly 
bristly. 
Leaflets glabrous or nearly so on both sides; stem unarmed. 
leaflets short-petio- 
VIII. CINNAMOMEAE 
30. 
ot. 
32. 
~arnrmnnrnr Ww 
R 
485 
. Aucuparie. 
. nilida. 
. foliolosa. 
. Palmeri. 
. Bicknellii. 
. petiolata. 
. lancifolia. 
. rudiuscula. 
. Treleasei. 
. texarkana. 
. conjuncta. 
. Williamsii. 
. johannensis. 
Infrastipular prickles not present; branches unarmed or bristly, not prickly 
Inflorescence corymbose, terminating the stems (or rarely the branches) ; 
plant mostly suffruticose; stem very bristly, usually dying back to 
near the ground (except in R. Bushii and R. polyanthema); leaflets 
usually 9-11. 
Leaves glabrous or nearly so, rounded at the apex. 
Leaflets obovate, pale or glaucous on both sides. 
Leaflets elliptic or oval, dark-green above. 
Leaflets mostly 2—5 cm. long, not glaucous, decidedly acute; 
plant 3 dm. high or more; flowers corymbose. 
Leaflets rarely more than 2 cm. long, mostly rounded at the 
apex, somewhat glaucous beneath; plant 1-2 dm. high; 
flowers 1-3. 
Leaves densely pubescent, especially beneath. 
Hypanthium globose or slightly pear-shaped. 
Plant 3-6 dm. high, usually dying back to near the ground. 
Sepals erect in fruit; plant not glaucous. 
Upper stipules and bracts not densely glandular; leaflets 
1.5—4 em. long; plant 3-5 dm. high. 
Upper stipules and bracts densely glandular; leaflets sel- 
dom more than 1.5 cm. long; plant 1-3 dm. high. 
Sepals reflexed in fruit; plant glaucous. 
Plant shrubby, not dying back; branches from the upper axils 
soon overtopping the inflorescence. 
Hypanthium decidedly pear-shaped. 
Inflorescence of few either solitary or corymbose flowers, ending lateral 
mie aa plant shrubby; leaflets usually 5 or 7 (or 9 on the turions 
only). 
Stems densely bristly even in age; stipules, petioles, and rachis in most 
cases glandular-granuliferous; flowers solitary. 
Leaflets comparatively thin, neither rugose nor strongly reticulate; 
branches and bristles glabrous. 
Hypanthium decidedly pear-shaped or elliptic, acute at the 
base, with a distinct neck at the top. 
Sepals rarely more than 1 cm. long; bark yellowish-green. 
Sepals 2—3 cm. long; bark brown. 
Leaflets distinctly obovate, rounded at the apex, spar- 
ingly hairy beneath. 
Leaflets elliptic or oval. 
Leaflets conspicuously glandular-granuliferous, but 
searcely at all hairy beneath, rounded-oval, often 
double-toothed. 
38. 
39: 
40. 
41. 
42. 
43. 
44. 
45. 
46. 
47. 
48. 
OD 
. subglauca. 
. avkansana. 
. Lunellit. 
. suffulta. 
alcea. 
. conjuncta. 
. polyanthema. 
. Bushit. 
. collaris. 
. Butleri. 
. Engelmannt. 
