72 



NORTH AMERICAN FLORA 



Bracts acute or gradually short-acuminate; stem and leaflets short- 

 hairy. 

 Leaflets elliptic-obovate, pubescent on both sides. 

 Leaflets oblong, glabrous above. 

 Calyx glabrous only at the base, more or less long-pilose between the ribs 

 as well as on the margin. 

 Bracts acute or short-acuminate, shorter than the calyx. 



Corolla about 10 mm. long; bracts more or less pubescent. 

 Corolla about 7 mm. long; bracts glabrous on the back. 

 Bracts caudate-acuminate, longer than the calyx. 



XXXIX. ThyrsiFlorae 



Leaves and branches glabrous or nearly so, except when very young. 

 Spikes capitate, sessile in the axils of the leaves and at the end of the 

 branches. 

 Leaflets 11-13, conspicuously glandular-punctate beneath, 3^1 mm. 



long. 

 Leaflets 5-9, less conspicuously glandular-punctate, 4-11 mm. 

 long. 

 Spikes short, but not capitate, mostly short-peduncled or at the end 

 of short leafy branches. 

 Bracts ovate, pubescent, conspicuously glandular-dotted; leaflets 



9-13, obovate, usually truncate to emarginate at the apex. 

 Bracts lanceolate, puberulent, not conspicuously glandular-dotted; 

 leaflets 7-9, elliptic, mostly rounded at the apex. 

 Leaves and branches decidedly villous. 



Calvx conspicuously glandular-dotted between the ribs. 



Bracts ovate, acute, scarcely longer than the calyx-tube. 



Inflorescence at least in fruit lax; calyx-lobes decidedly hooked 



at the apex; leaf-rachis decidedly winged. 

 Inflorescence short and dense; leaf-rachis slightly winged. 

 Leaflets 9-17; calyx-lobes scarcely hooked. 

 Leaflets 3-9; calyx-lobes slightly hooked. 

 Bracts lance-ovate, long-acuminate, much exceeding the calyx- 

 tube. 

 Calyx-tube almost glabrous, its glands large, confluent. 

 Calyx-tube densely pubescent, its glands small, distinct. 

 Leaflets 9-15. 

 Leaflets 5—9. 

 Calyx not conspicuously glandular-dotted between the ribs; bracts 

 lance-ovate, acuminate, pubescent. 

 Leaflets 7-11. 

 Leaflets 13-21. 



168. P. capitulala. 



169. P. tehnacana. 



170. P. emphysodes. 



171. P. scandens. 



172. P. domingensis. 



173. P. floridana. 



174. P. humilii. 



176. P. occidentalis. 



177. P. platyphylla. 



17S. P. barbala. 

 139. P. sessilis. 



X. Lagopodes. Annuals, simple below, branched above. Leaflets rather numerous, 

 small, glabrous. Spikes dense, cylindric, peduncled at the ends of the branches; bracts nar- 

 row, acuminate: Flowers sessile. Calyx-tube deeply cleft on the back. Calyx-lobes fili- 

 form-subulate, plumose, about equaling the calyx. Corolla blue, violet, or purple. Blade 

 of the banner sub-cordate. Wings and keel-petals inserted just below the middle of the stami- 

 nal tube, the blades obliquely oval or oblong, subequal, with a rounded basal lobe. Staminal 

 tube long exserted. 



47. Parosela lagopina Rydberg, sp. nov. 



A stout herb, probably annual; stem 7 dm. high or more, glabrous, striate, often purple- 

 tinged, branched above; leaves 5-10 cm. long; stipules subulate, caducous; petiole and rachis 

 glabrous, sparingly glandular-dotted; stipels gland-like ; leaflets elliptic, 4-5 mm. long, glabrous, 

 glandular-dotted beneath, rounded at each end; peduncles terminating the branches, 5-15 cm. 

 long; spikes dense, cylindric, 3-5 cm. long; rachis finely and densely pilose; calyx-tube deeply 

 campanulate, 4 mm. long, strongly 10-ribbed, densely pilose, with many small inconspicuous 

 glands rather irregularly scattered; lobes deltoid, with subulate tips, 3 mm. long; corolla 

 bluish-purple; blade of the banner reniform-cordate, 3.5 mm. long, 4 mm. broad, the claw 3 mm. 

 long; blades of the wings and keel-petals 5 mm. long, the claws 1-1.5 mm. long; pod broadly 

 obliquely obovate, finely pubescent and minutely glandular-dotted above the middle. 



Type collected at Chacala, Durango, March 7, 1899, Goldman 357 (U. S. Nat. Herb. no. 

 360278). 



