ROSE FAMILY 433 



Geum ciliatum Pursh. Enjthrocoma disscda, and E. ciliala Greene. Mountains 

 and hills: Alta.—N.M.— Utah— Wash.— B.C. Submont.—Subalp, My-Au. 



S. ciliata X griaea. Intermediate between the two species. E. australis Greene. 



5. S. flavula (Greene) Rydb. Stem 2-3 dm. high, rather slender, yellowash, 

 only slightly tinged with red, finely pilose; basal leaves 5-15 cm. long; principal 

 leaflets cuneate or rhombic-cuneate, finely puberulent, and ciliate on the margins 

 and veins, yellowish green; hypanthium low, hemispheric; bractlets linear-sub- 

 ulate; sepals deltoid-lanceolate, yellow, merely purple- veined ; petals yellow, 

 oval, barely exceeding the sepals. Scarcely distinct from S. ciliata, E. flavula 

 Greene. Mountains: Wyo. — IMont. Mont, My-Au. 



6, S. brevifolia (Greene) :Rydb. Stem 1-2 dm. high, with few reduced 

 leaves, pilose; basal leaves numerous, short, 4-8 cm. long; principal leaflets 

 cuneate in outline, about 1 cm. long, hirsute and glandular-pruinose; hypanthium 

 hemispheric; bractlets linear; sepals elliptic or lance-elliptic, purjple-veined; 

 petals yellow, elliptic or oval. Closely related to 5. ciliata. E, brevifolia Greene. 

 Mountains: c .Utah. Submont. — MonL Je-Jl. 



28. ACOMASTYLIS Greene. 



Low cespitose perennials, with strong rootstocks. Basal leaves numerous, 

 pinnately divided, with numerous cleft or toothed divisions; stem-leaves few, 

 reduced and with few divisions. Flowers terminal, sohtary or in 2-4-flowered 

 cymes. H3^panthium more or less turbinate. Bractlets and sepals 5. Petals 

 5, obovate, oval, or suborbicular, yellow. .Stamens numerous, inserted in the 

 mouth of the hypanthium. Pistils numerous; ovaries hirsute, lanceolate, taper- 

 ing into the glabrous, persistent styles, which do not elongate in fruit; ovules 

 basal. 



Leaves densely silky-canes cent. 1. A. sericea, 



Leaves puberulent, somewhat glandular-granuliferous or glabrate, not silky. 



2. A. turbinata. 



1. A, sericea Greene. Stem 1-3 dm. high, slender, silky; basal leaves 5-10 

 cm. long, densely silky-villous; segments 15-25, cuneate in outline; stem-leaves 

 1-3; hypanthium short-turbinate, 4-5 mm. high and broad; bractlets lanceolate; 

 sepals triangular-ovate; petals yellow, orbicular, 8-10 mm. long. Geum sericeum 

 Greene. Sieversia sericea Greene. Mountains: Nev. — Ida. — Wyo. — Mont. 



2. A. turbinata (Rydb.) Greene. Stem slender, 0.5-3 dm. high, silky- 

 strigose or glabrate; basal leaves 5-15 cm. long; segments 11-33, oblanceolate, 

 obovate, or cuneate in outline, with lanceolate or oblong lobes; stem-leaves 1-3; 

 hypanthium obconic-turbinate, about 5 mm. high and broad; bractlets lanceo- 

 late; sepals ovate, short-acuminate; petals yellow, broadly obovate or obcordate, 

 6-8 mm. long. Potentilla nivalis Torr, Geum turbinatum Rydb. Sieversia 

 turbinata Greene. S. scapoidea A. Nels. A, arapahoensis Daniels. Moun- 

 tains: Mont.— N.M.— Ariz.— Nev. MonL~Alp. Je~Au. 



i 



29. FALLUGIA Endl. Apache Plume, 



Low shrub, with straw-colored branches and flaky bark. Leaves pinnately 

 dissected into linear divisions, revolute on the margins, and vd\h small stipules. 

 Flo\vers solitarj^ or few at the ends of the branches, pedimcled. H>T>anthium 

 hemispheric, persistent, villous witliin. Sepals 5, imbricate. Bractlets present. 

 Petals 5, white, rounded, spreading. Stamens numerous, inserted on the margin 

 of the h^'panthiiun in thi-ee scries. Pistils numerous, villous, on a conic re- 

 ceptacle; style terminal; ovules solitary, erect, basal. Fruit of coriaceous, vil- 

 lous, oblong achenes, with (in fruit) elongate, plumose, persistent styles. 



1. P. paradoxa (D. Don) Endl. A shrub 5-10 dm. high, much branched; 

 bark white, in age somewhat shreddy; leaves pinnatifid, with 3-7 hnear, revolute 

 divisions, puberulent, villous or in age glabrate, rusty-lepidote beneath, 1-2 cm. 

 long; flowers few, in corymbiform cj^mes; hypanthium hemispheric, 4-5 mm. 

 high, silky-villous; sepals 8-10 mm. long, often rose-tinged, villous; outer ones 

 lanceolate or ovate, long-acuminate-caudate, 3-cleft at the apex, or entire; petals 



18 



