450 ROSACEAE 



24. FALLUGIA Endl. Gen. 1246. 1840. 



Shrubs with stramineous branches and scaly bark. Leaves pinnately divided into small 

 linear divisions, revolute on the margins, deciduous. Stipules present, small. Flowers 

 terminal, peduncled, solitary or few. Hypanthium hemispheric, persistent. Sepals 5, 

 imbricate. Bractlets present. Petals 5, orbicular, spreading, white. Stamens numerous, 

 inserted in 3 series on the margin of the hypanthium. Pistils numerous on the conical 

 receptacle, villous; style terminal; stigma minute; ovules solitary, erect, basal. Achenes 

 oblong, coriaceous, villous, tipped by the elongated plumose styles. Seeds linear; embryo 

 with inferior radicle. [Name in honor of V. Falugi, Abbot of Vallombrosa.] 



A monotypic genus of western North America. 



1. Fallugia paradoxa (D. Don) Endl. Apache Plume. Fig. 2478. 



Sieversia paradoxa D. Don, Trans. Linn. Soc. 14: 576. 1825. 



Geum cercocarpoides DC. Prod. 2: 554. 1825. 



Fallugia mexicana Walp. Rep. 2: 46. 1841. 



Fallugia paradoxa Endl. ex Torr. in Emory, Notes Mil. Rec. 140. 1848. 



Fallugia paradoxa var. acuminata Wooton, Bull. Torrey Club 25: 306. 1901. 



Much branched shrub, 5-15 dm. high, the pale whitish branchlets pilose. Leaves with 3-7 

 linear divisions, 1-2 cm. long, rusty-lepidote beneath, pubescent or glabrate above ; flowers few, 

 in corymbose cymes ; hypanthium 4-5 mm. broad, silky-villous ; sepals variable, 8-10 mm. long, 

 the outer lanceolate, acuminate-caudate, the inner ovate or broadly oval ; bractlets subulate to 

 lanceolate, shorter than the sepals ; petals obovate, about 2 mm. long ; pistils numerous ; styles 

 in fruit 3-4 cm. long. 



Gravelly or rocky slopes, mainly Lower Sonoran Zone; eastern Mojave Desert, California, to Nevada, south- 

 ern Colorado, Arizona, western Texas, and Mexico. Type locality: Mexico. May-June. 



25. COWANIA D. Don, Trans. Linn. Soc. 14: 574. 1825. 



Shrubs or small trees with alternate coriaceous glandular-dotted leaves. Flowers 

 terminal, solitary on short branches. Hypanthium persistent, more or less turbinate. 

 Sepals 5, imbricate. Petals 5, obovate, spreading. Stamens numerous, in two series, in- 

 serted in the throat of the hypanthium. Pistils 1-12, distinct, densely hirsute; style ter- 

 minal, plumose, persistent and elongated in fruit ; ovules solitary. Achenes striate, villous- 

 hirsute ; seeds linear ; radicle inferior. [Name in honor of John Cowan, British merchant 

 and botanist.] 



About 6 species, natives of the southwestern United States and Mexico. Type species, Cowania mexicana D. 

 Don. 



1. Cowania Stansburiana Torr. Stansbury's Cowania. Fig. 2479. 



Cowania Stansburiana Torr. in Stansbury's Exp. 386. 1852. 



C. mexicana var. Stansburiana Jepson, Man. Fl. PI. Calif. 498. 1925. 



Erect shrub, 1-3.5 m. high with gray shreddy bark, and reddish brown glandular twigs. 

 Leaves obovate in outline, 8—15 mm. long, pinnately 3-5-divided, glandular-punctate and green 

 above, more or less tomentulose beneath, the divisions linear or narrowly oblong and usually cleft 

 or toothed, revolute on the margins ; pedicels 2-8 mm. long, with stalked glands ; hypanthium 

 turbinate-funnelform, 4-6 mm. long, more or less glandular and tomentose when young; sepals 

 4 mm. long, broadly ovate, obtuse or acutish, about equaling the tube ; petals yellow to white, 

 broadly obovate, 8-10 mm. long ; pistils 5-10 ; styles 4-5 cm. long in fruit. 



Hillsides and dry washes of the desert region, Upper and Lower Sonoran Zones; Nevada, Utah, and south- 

 ern Colorado, south to the Providence Mountains, southern California, New Mexico, and northern Mexico. Type 

 locality: Stansbury Island, Great Salt Lake, Utah. April-Sept. 



This species has been confused with Cowania mexicana D. Don of central Mexico which has a campanulate 

 hypanthium and leaves without secondary divisions. 



Cowania alba Goodding, Bot. Gaz. 37: 55. 1904. (C. mexicana var. dubia Brandg. Zoe 5: 149. 1903.) 

 Apparently only a form of C. Stansburiana with fewer (1-3) pistils and shorter fruiting styles. Providence 

 Mountains, California to southern Nevada. 



26. PURSHIA DC. ex Poir. in Lam. Encycl. Suppl. 4:623. 1816. 



Erect shrubs or small trees, with alternate, apparently fascicled, deeply 3-cleft leaves. 

 Flowers solitary, terminating short branches. Hypanthium persistent, turbinate or funnel- 

 form. Sepals 5, imbricate. Petals 5, yellow. Stamens about 25, in one series, inserted on 

 the margin of the hypanthium. Pistils 1, rarely 2, oblong-lanceolate, tapering into a short 

 style; ovule solitary, erect. Fruit an achene tipped by the slightly elongated persistent 

 style; seed without endosperm; radicle inferior. [Name in honor of Frederick Pursh, 

 author of one of the earliest North American floras.] 



Two species, natives of western North America. Type species, Tigarea tridentata Pursh. 



Leaves pubescent above, densely tomentose beneath; glands not sunken into the tissue of the leaves. 



1. P. tridentata. 

 Leaves glabrous at least above; glands sunken into the tissue of the leaves. 2. P. glandulosa. 



