Flora of the Paloase Region 147 



C. flaccida Greene. Erect, 20-40 cm. high, branched, minutely strigose 

 and canescent throughout: leaves linear, narrow, 1-3 cm. long: flowers in 

 slender bractless spikes, loose and elongated in fruit: fruiting calyx 4-5 mm. 

 long, appressed to the stem, the sepals linear, very bristly especially at base : 

 corolla white, 2-3 mm. long: nutlets solitary, smooth and shining, pear- 

 shaped, acuminate, shorter than the sepals, with a groove on the ventral 

 side, extending the whole length and somewhat widened at the base. Rocky 

 places, banks of Snake River. 



C. affinis Greene. Slender, branched from the base, erect or ascending, 

 10-30 cm. high, rather soft-hairy: leaves oblong-linear, obtuse, 1-2 cm. long: 

 spikes loose, bractless, 2-6 cm. long: fruiting calyx 3 mm. long, hispid: nut- 

 lets all four maturing, dark, smooth, ovate-oblong, acute, 1.5 mm. long: ven- 

 tral groove simple, continuing the whole length of the nutlet. Open pine 

 woods, Kamiack Butte and Thatuna Hills. 



C. torreyana Greene. Erect or ascending, commonly branched from the 

 base, 15-30 cm. high, long-hairy and hispid throughout: leaves oblong-linear, 

 obtuse, 2-5 cm. long: spikes bractless, solitary or in pairs, 1-8 cm. long: fruit- 

 ing calyx 5 mm. long, very bristly, the lobes linear: corolla white: nutlets 

 narrowly pear-shaped, acute, smooth and shiny, 2 mm. long; ventral groove 

 forked near the base, but no depression between the forks. Common and 

 abundant. 



C. ambigua Greene. Slender, 15-30 cm. high, short, hispid: leaves ob- 

 long-linear, 1-2 cm. long: spike bractless, rather few-flowered: fruiting calvx 

 6-8 mm. long, with rather small bristles, the lobes linear: nutlets all four 

 maturing, ovate, acute, rough, with papillae of two sizes; ventral groove 

 forked at the very base. Pine woods, Thatuna Hills. 



C. muriculata Greene. (Allocarya hendersoni A. Nelson.) Annual, 

 erect, branched from the base, 10-20 cm. high, hispid throughout: leaves ob- 

 long or linear, 1-3 cm. long: spikes often in pairs or 3-5 in a cluster, bract- 

 less: fruiting calyx 5 mm. long, short-bristly, with linear lobes, twice as long 

 as the fruit: corolla 5-6 mm. broad, with prominent appendages in the throat: 

 nutlets 2 mm. long, usually all four wanting, ovate-triangular, obtuse, 

 roughened, with minute papillae and some larger ones on the back and usu- 

 ally on the ventral faces; ventral groove extending from the apex to near 

 the base where it widens out into a triangular depression. Pullman and Pa- 

 louse City, infrequent. 



243. PLAGIOBOTHRYS. 



Very similar to Allocarya and Cryptanthe but the radical leaves 

 in a rosette and the nutlets attached by the middle of the some- 

 what concave inner face to a hemispherical or globular gynobase. 



P. tenellus Gray. Annual, with usually man}- stems from the base, 5-20 

 cm. high, rather soft-hairy throughout: radical leaves in a rosette, oblong- 

 linear or lanceolate, .5-2 cm. long; cauline few, lanceolate, .5-1 cm. long: 

 spikes loose, leafy at base: fruiting calyx 3 mm. long, hispid with yellow- 

 hairs, the lobes lanceolate: nutlets pale greenish, shining, prominently 

 keeled and papillate, somewhat cross-shaped because of tin.- constrictions at 

 the base and apex, incurved, hollowed on the ventral face, with a projecting 

 process which attaches it to the gynobase. Sandy soil along Snake River. 



