CARDUACEAE. 455 



29. NEOTHYMOPSIS Britton & Millspaugh. 



[Thymopsis Benth. in Benth. & Hook. Gen. PI. 2: 407. 1873. 

 Not Jaub. & Spach, 1843.] 



Low diffuse, annual or perennial, hirsute or puberulent herbs, with oppo- 

 site small broad leaves, and few-flowered, small heads of tubular flowers, the 

 outer pistillate the inner perfect. Bracts of the involucre few, nearly equal, 

 hirsute or ciliolate. Receptacle naked, flat. Corolla of pistillate flowers 

 slender, 2-3-toothed, shorter than the style, minutely 2-4-toothed; corolla of 

 perfect flowers with a campanulate, 4-toothed limb. Anthers obtuse at the 

 base, entire. Achenes oblong, nearly terete, striate. Pappus a fringed 

 crown of several scales. [Greek, new Thymopsis.] Only the two following 

 species are known. Type species: Tetranthus thymoides Griseb. 



Plants hirsute-hispid throughout; flowers 10 in a head; awned. 1. N. Wrightii. 



Plants slightly pubescent ; flowers 5 in a head ; perennial. 2. N. Iirittonii. 



1. Neothymopsis thymoides (Griseb.) Britton & Millspaugh. 



Tetranthus thymoides Griseb. Cat. PI. Cub. 286. 1866. 



Thymopsis Wrightii Benth. loc. cit. 1873. 



Thymopsis thymoides Urban, Symb. Ant. 5: 254. 1907. 



Annual; stems very slender, little branched, 1-3 dm. long, short-hirsute. 

 Leaves ovate, 10 mm. long or less, acute or obtuse at the apex, narrowed into 

 petioles, hirsute-hispid; heads nearly sessile in the axils, about 10-flowered; 

 involucre of 5 or 6 oblong, obtuse, hirsute bracts about 3 mm. long. 



Moist places, Acklin*s Island and Mariguana : Cuba. 



2. Neothymopsis Brittonii (Greenm.) Britton & Millspaugh. 



Thymopsis Brittonii Greenm. Bull. N. Y. Bot. Gard. 3: 453. 1905. 



Perennial; stems several, erect or ascending, slender, 4-10 cm. long, 

 puberulent. Leaves rhombic-ovate to somewhat spatulate, 4-8 mm. long, one- 

 half as broad, obtuse, entire, revolute-margined, narrowed below to a short 

 petiole, sparingly puberulent to glabrous, dark green above, paler and glandu- 

 lar-punctate beneath; heads terminating the stem and branches, sessile, about 

 3 mm. high, 5-flowered ; involucre of 5 (4) oblong obtuse, navicular, or some- 

 what obtusely carinate-eoncave, ciliolate green bracts. 



Moist places, New Providence and Great Exuma. Endemic. 



30. POROPHYXLUM Yaill; Adans. Fam. PI. 2: 122. 1763. 



Herbs, or some species shrubby, glanduliferous, glabrous and often glau- 

 cous. Leaves alternate, or the lower opposite, toothed or entire. Heads 

 corymbose or solitary, long-stalked. Involucre narrowly campanulate or cylin- 

 drie, its bracts 5-9. Receptacle small, not chaffy. Ray-flowers none. Disk- 

 flowors perfect and fertile; corollas with a slender tube and narrowly cam- 

 panulate limb. Achenes linear, many-striate, glabrous or pubescent. Pappus 

 of copious capillary roughish bristles in 1 or 2 series. [Greek, porose-leaved.] 

 About 25 species, of warm-temperate and tropical America, the following 

 typical. 



