Flora of the Palouse Region 145 



239. HESPEROCHIROX. 



Stetuless perennials, pubescent: leaves spatulate or oblong, en- 

 tire, on margined petioles: flowers purplish or nearly white, on 

 naked 1 -flowered scapes: calyx 5-parted, rarely 6-7-parted, the 

 lanceolate or linear lobes sometimes unequal: corolla campanulate 

 or rotate, 5-cleft, rarely 6-7-cleft: stamens on the base of the cor- 

 olla-tube, unequal, included: ovary partly 1 -celled, tapering into a 

 short style, barely 2-cleft at the tip; ovules numerous on dilated 

 placentae. 



Corolla rotate, the lobes longer than the tube. H. pumilus. 



Corolla campanulate, the lobes shorter than the tube. H. cauforxicus. 



H. pumilus Porter. Rootstock slender: low, 5-8 cm. high, appressed- 

 puberulent: leaves few, spatulate, obtuse, 1-3 cm. long, the petiole as long or 

 shorter: peduncle not exceeding the leaves: corolla white, with purple veins, 

 rotate, about 1 cm. broad, the lobes longer than the tube. Moist hillsides, 

 rare. 



H. califomicus Wats. Very similar to the last but larger in every way: 

 rootstocks stouter: leaves spatulate or oblong, obtuse, more pubescent, 2-4 

 cm. long, the petioles mostly as long: corolla campanulate, the lobes shorter 

 than the tube. Moist places near Moscow. 



Family 65. BORRAGINACEAE. 



Mostly rough-hairy herbs: leaves alternate, entire, without sti- 

 pules: flowers regular, perfect: calyx 5-parted: corolla 5-lobed, 

 sometimes with projecting appendages (fornices) in the the throat: 

 stamens 5, inserted on the corolla-tube: style 1; ovary usually 

 deeply 4-lobed, forming in fruit 4 seed-like nutlets, or separating 

 into two 2-seeded nutlets; nutlets attached by the base or inner angle 

 or face to the receptacle, which is sometimes elongated (the gyno- 

 base); endosperm none. Mature fruits are necessary for accurate 

 determinations in this family. 



Nutlets fixed by their very base to a flat receptacle. 



Flowers leafy-bracted: corolla-lobes imbricated in the bud. 



247. I.ITHOSPKRMUM. 

 Flowers not leafy-bracted: corolla-lobes convolute in the bud. 



246. MVOSOTIS. 

 Nutlets fixed by some part of the inner angle or face to the gynobase. 

 Nutlets armed with backwardly barbed prickles. 240. i.appui.a. 

 Nutlets not armed with barbed prickles. 



Flowers blue. 244. mertexsia. 



Flowers yellow. 245. amsixckia. 



Flowers white. 



Nutlets attached only at the inside of the base to a slightlv ele- 

 vated gynobase. 241. AI.LOCARVA. 

 Nutlets attached by the middle of the somewhat concave inner 

 face to a hemispherical or globular gynobase. 



243. PI.AGIOBOTHRYS. 

 Nutlets attached for one-third or more of their length by the 

 ventral face or angle to a slender mostly subulate 

 gynobase. 242. cryptaxThe. 



