Part 2, 1915] CARDUACEAE : HELENIEAE 117 



equaling the funnelform throat; achenes 3 mm. long, strongly hirsute; squamellae ovate, 



2 mm. long, acuminate into an awn-tip. 



Type locality: Moran [Hidalgo]. 



Distribution: Coahuila to Vera Cruz and Oaxaca. 



Illustration: H. B. K. Nov. Gen. & Sp. pi. 111. 



21. Hymenoxys insignis (A. Gray) Cockerell, Torrc.ya 4: 170. 1904. 



Aclinella insipnis A. Gray, Proc. Am. Acad. 19: 31. 1883. 



An annual or biennial; stem stout, 6 dm. high, branched; leaves twice or thrice pinnately 

 divided into narrowly linear divisions, scarcely punctate; heads corymbose; peduncles listulose, 

 2-6 cm. long; involucre depressed-hemispheric, 10 mm. high, 20 mm. broad; receptacle de- 

 cidedly convex; outer bracts linear-lanceolate, united only at the base; inner bracts similar 

 but somewhat larger; ligules more than 1 cm. long; disk-corollas 3-4 mm. long; tube very 

 short; achenes 3 mm. long, densely hirsute; squamellae broadly ovate, muticous, scarcely 

 longer than the breadth of the achene. 



Type locality: Lerios, in the mountains east of Saltillo, Coahuila. 

 Distribution: Known only from the type Locality. 



22. Hymenoxys excurrens (Cockerell) Rydberg, sp. nov. 



Hymenoxys chrysanthemoides excurrens Cockerell, Bull. Torrey Club 31: 501. 1904. 



A leafy annual; stem 3-6 dm. high, branched above, striate, somewhat pubescent; leaves 

 3-6 cm. long, glabrate and not conspicuously punctate, pinnately dissected into narrowly 

 linear divisions; heads many, corymbose-cymose; peduncles 4-7 cm. long; involucre 6 mm. 

 high, 8-10 mm. broad, slightly pubescent or puberulent; outer bracts lanceolate, thick and 

 convex on the back, with narrow herbaceous margins and tips, acuminate and the tips rather 

 loose; ligules 8-9 mm. long, 3 mm. wide; disk-corollas 3 mm. long, decidedly glandular; achenes 



3 mm. long; squamellae nearly 2 mm. long, ovate, acuminate, awn-pointed. 



Type locality: Yuma, Arizona. 



Distribution: Western Arizona, southern California, and Lower California. 



Illustration: Bull. Torrey Club 31: pi. 22, f. 3. 



23. Hymenoxys odorata DC. Prodr. 5: 661. 1836. 



Aclinella odorala A. Gray, Mem. Am. Acad. II. 4: 101. 1849. 



Phileozera multiflora Buckl. Proc. Acad. Phila. 1861: 459. 1862. 



Hymenoxys Schaffneri Klatt, Leopoldina 23: 146. 1885. 



Ptilepida odorata Britton, Mem. Torrey Club 5: 340. 1894. 



Picradenia odorata Britton; Britt. & Brown, 111. Fl. 3: 449. 1898. 



Picradenia multiflora Greene, Pittonia 3: 273. 1898. 



Picradenia odorata Osterhoutii Cockerell, Bull. Colo. Coll. Mus. 1: 2. 1903. 



Hymenoxys chrysanthemoides juxta Cockerell, Bull. Torrey Club 31: 503. 1904. 



Hymenoxys chrysanthemoides Osterhoutii Cockerell, Bull. Torrey Club 31: 505. 1904. 



Hymenoxys chrysanthemoides Mearnsii Cockerell, Bull. Torrey Club 31: 506. 1904. 



Hymenoxys chrysanthemoides multiflora Cockerell, Bull. Torrey Club 31: 507. 1904. 



Hymenoxys multiflora Rydb. Bull. Torrey Club 33: 157. 1906. 



Hymenoxys multiflora Osterhoutii Rydb. Bull. Torrev Club 33: 157. 1906. 



Hymenoxys Cockerellii Wooton & Standley, Contr. U. S. Nat. Herb. 16: 192. 1913. 



Hymenoxys Mearnsii Wooton & Standley, Contr. U. S. Nat. Herb. 16: 192. 1913. 



A branched annual; stem 1-3 dm. high, more or less pubescent, striate, but not glandular; 



leaves 4-6 cm. long, more or less pubescent, inconspicuously punctate, pinnately or bipinnately 



divided into narrowly linear divisions; heads numerous, corymbosely cymose; peduncles 2-5 



cm. long; involucre turbinate, 4-5 mm. high, 5-10 mm. broad, more or less hirsute; outer 



bracts 6-10, lanceolate, acute, united at the base, rather thick and convex on the back, thin 



and herbaceous on the margins; inner bracts similar but longer and broader and with narrower 



margins; ligules 3-6 mm. long, 2-4.5 mm. wide; disk-corollas 4 mm. long, sparingly glandular; 



tube about 1 mm. long; achenes 2.5 mm. long, densely hirsute; squamellae ovate, 1.5 mm. 



long, acuminate into a short awn. (H. Cockerellii represents the typical form; 77. multiflora, 



a depauperate; and H. Mearnsii, a low more hairy form.) 



Type locality: "Mexico." 



Distribution: Kansas and Colorado to Tamaulipas, Chihuahua, and Coahuila. 

 Illustrations: Deless. Ic. 4: pi. 42; Bull. Torrey Bot. Club 31: pi. 23, f. 1, 2; Britt. & Brown, 

 111. Fl. /. 3971; ed. 2. /. 4541. 



