OXYTROPIS 



OZOTHAMNUS 



2421 



sheep are difficult to herd, as they stray away from the 

 flock; slight locomotor ataxia is manifested with twitch- 

 ing of the eyelids and grinding motion of the jaws. 

 About a dozen kinds of Oxytropis are cult, in Eu., 

 mostly as rock plants. They are hardy, easily prop, by 

 seeds or division, and prefer a dry, sandy loam. These 

 plants are of minor value horticulturally. 



A. Stipules free: pod 1-celled. 



deflexa, DC. (Ardgallus deflexus, Heller). Leafy- 

 stemmed to nearly stemless, a foot or less tall with 

 crowded Ifts. in 12-16 pairs, lanceolate to oblong, 3-6 

 lines long: fls. rather small, about 3 lines long, pale 

 purple: pods pendant, 1-celled, many times exceeding 

 the calyx. Mountains, Brit. Amer. to Colo, and Utah. 

 Fls. June, July. Prefers moist open ground throughout 

 the eastern Rockies at lower altitudes. A very distinct 

 species by reason of its stipules almost free, or only 

 slightly adnate to the base of the petioles. 



AA. Stipules decidedly adnate to petioles: pods not 



pendant, 2-celled. 

 B. Lvs. strictly pinnate; Ifts. opposite. 



Lambertii, Pursh. (Ardgallus Ldmbertii, Greene). 

 Fig. 2693. A tufted perennial with strong taproot and 

 several erect scapes, 420 in. tall: spike short-oblong, 

 densely fld.; fls. usually purple or violet: Ifts. about 7 

 pairs: pod broadly or narrowly oblong, silky pubescent, 

 firm-coriaceous, 2-celled. Fls. June, July. Includes O. 

 campestris, Hook. Fl. Bor. Am. in part, also Ardgallus 

 patens, A. angustatus and A. atropurpureus of Ryd- 

 berg. B.M.2147 (dark blue). B.R. 1054 (blue). V. 

 3:138. Aven Nelson, in Erythea 7:62, says that the 



specific name should be kept for the purple-violet-fld. 

 forms. D. M. Andrews offers a crimson-fld. form and 

 also var. spicata, which has large spikes of white fls. 

 Common along the Great Plains from Sask. to New 

 Mex. and in the foothills where it is held to be respon- 

 sible, as a loco-weed, for the poisoning and death of 

 sheep and cattle. A clue as to its cultural requirements 

 may be had from its wild habitat in open ground grow- 

 ing in masses of considerable extent. 



BB. Lfts. verticillate, numerous. 



splendens, Douglas. A very showy, densely silky, 

 silvery-villous, stemless, tufted plant, 418 in. tall: 

 Ifts. numerous, fascicled in 3's or 4's, as if verticillate: 

 scape spicately, many-fld.; fls. bright-blue to deep 

 purple, about %m. long in June: pod ovate, hairy, 

 much longer than the calyx. Native to open ground on 

 the eastern slopes of the Rockies and in dry alpine 

 meadows. 



O. hybrida, Bruegg. Probably a hybrid between O. campestris 

 and O. sericea or O. Hallesi. Perennial, from Switzerland. O. 

 ochroleuca, Bunge. Lvs. pinnate, 3-4 in. long, with oblong-lanceo- 

 late Ifts. : fls. small, drooping, in short racemes, yellowish white. N. 

 Asia. O. villdsa, Blank (Aragallus villosus, RydbJ, Densely ces- 

 pitose: foliage silvery white: fls. creamy white, in dense spikes; 

 calyx silky, villous: pod white-silky tipped with hooked beak. 

 Mont. O. yunnanensis, Franch. Sts. many, woody: Ifts. in 8-11 

 pairs, lanceolate: fls. in dense head of 7-12, deep blue. Yunnan. 



JOHN W. HARSHBERGER. 



OXYCTRA: Layia. 



OYSTER PLANT or SALSIFY: Tragopogon porrifolius. . 



OZOTHAMNUS: Hslichrysum diosmxfolium (O. rosmarinv- 

 folius). 



2693. Oxytropis Lambertii. ( X l /) 



