Part 1, 1914] CARDUACEAE : HELENIEAE 11 



somewhat angled at the truncate apex, tapering gradually downwards, glandular-granuliferous, 

 almost equally striate-ribbed. 



Type locality: Along the [Rio Grande] Del Norte [New Mexico]. 

 Distribution: Western Texas to Nevada and Chihuahua. 

 Illustration: Emory, Notes Mil. Recon. Bot. pi. 6. 



6. Baileya australis Rydberg, sp. nov. 



A floccose biennial or perennial; stem ascending, branched at the base, floccose; leafy 

 only towards the base; basal leaves cuneate or spatulate, 3-lobed, densely floccose, lower 

 stem-leaves 5-10 cm. long, pinnately cleft into long linear-oblong divisions; peduncles about 

 1 dm. long; involucre 8-10 mm. high, 15-18 mm. broad; Hgules 40-50, linear, about 15 mm. 

 long, 3-4 mm. wide, with 3 lanceolate teeth; disk-flowers very numerous; corollas 3 mm. long, 

 puberulent; achenes 4 mm. long, tapering from the truncate summit, 5-angled, the ribs on the 

 angles prominent and produced into blunt callous teeth at the apex, the intermediate ribs 

 obsolete. 



Type collected at Santiago Papasquiaro, Durango, 1896, E. Pahner 50 (herb. N. Y. Bot. Gard.). 

 Distribution: Durango and Aguascalientes. 



10. WHITNEYA A. Gray, Proc. Am. Acad. 6: 549. 1865. 



Low tomentose perennials of the habit of Arnica, with rootstocks. Stem simple, bearmg 

 2-3 pairs of opposite, entire, or denticulate leaves. Heads radiate, many-flowered. Involucre 

 campanulate; bracts 9-12, herbaceous, lanceolate-oblong, equal, only slightly overlapping. 

 Receptacle conic, faveolate, villous. Ray-flowers 7-9, pistillate, fertile; ligules oblong, 

 obscurely 3-toothed at the apex, 9-16-nerved, becoming papery, and persistent. Disk 

 flowers numerous, sterile. Corollas pubescent; tube very short; throat tubular-f unnelf orm ; 

 limb obtusely 5-toothed. Anthers linear. Style-branches of the disk-flowers linear, hirsute 

 pubescent, with obtusish appendages. Achenes of the rays oblong, somewhat compressed, 

 with several faint nerves, hirsute; pappus none. 

 Type species, Wh-itneya dealbata A. Gray. 



1. Whitneya dealbata A. Gray, Proc. Am. Acad. 6: 550. 1865. 



A low perennial with slender rootstock; stem 2-3 dm. high; leaves opposite, the lower ones 

 spatulate or elliptic, petioled, the upper lanceolate, all entire or denticulate, acute at each end, 

 densely canescent, mostly 3-ribbed; inflorescence cymose; heads 1-5; involucre about 8 mm 

 high and 10-12 mm. broad; ligules oblong, 1-1.5 cm. long, 6-7 mm. wide; achenes oblong, 

 4 mm. long. 



Type locality: California. 

 Distribution: Sierra Nevada, California. 



Subtribe 3. PERITYLANAE. Heads radiate or discoid. Ray-flowers, 

 if present, pistillate. lyigules deciduous. Disk-flov^^ers hermaphrodite, mostly 

 4-toothed, all fertile. Achenes flat, with only marginal callous nerves, 

 these usually ciliate. Style-branches and their appendages slender. Re- 

 ceptacle flat or convex. Involucre of narrow erect bracts in one or sometimes 

 two subequal series. 



Bracts of the involucre distinct, mostly in 2 equal series. 



Bracts of the involucre more or less boat-shaped, partly surrounding the 

 marginal achenes and double-ribbed on the back.* 

 Throat of the disk -corollas campanulate or funnelform, not much if at 

 all exceeding the tube. 

 Pappus of a crown of small squamellae and 0-2 awns; margins of 

 the achenes ciliate; appendages of the style-branches short. 

 Tomentose shrubs; heads in naked corymbs, discoid; pappus- 

 bristles absent. 11. Nesothamnus. 

 Glandular or cinereous herbs or low undershrubs; heads soli- 

 tary or few on long peduncles, usually radiate; pappus-bristles 

 1 or 2, in one species sometimes wanting. 12. Perityle. 



