GREENMAN. — NEW ANGIOSPERMS FROM MEXICO. 117 



guished by the presence of the pappus, and the short corolla-lobes ; and 

 from the latter by the glandular pubescence throughout instead of being 

 densely hirtellous on stem and leaves with only a few glandular hairs 

 above in the inflorescence. 



Tagetes Nelsonii. Stem striate, purplish, glabrous: leaves oppo- 

 site, petiolate, pinnatisect ; divisions 3 to 7, elliptic-lanceolate, 1 to 6 cm. 

 long, 0.5 to 2 cm. broad, acute, sharply and evenly dentate, each tooth 

 bearing a single gland, dark green above, paler beneath, glabrous or 

 slightly puberulent' on the upper surface, distinctly crisp-puberulent on 

 the lower surface, evenly glandular-punctate: inflorescence a terminal 

 many-headed corymbose cyme : heads about 1 cm. high, radiate : invo- 

 lucre cylindrical, 5-7 -dentate, numerously punctate with oblong-elliptic 

 glands : ray-flowers usually 5, occasionally 6 ; tube slender, nearly 

 equalling the oblong 0.5 cm. long lamina: disk-flowers 9 to 12: pappus 

 of short, unequal scales : achenes 4 to 5 mm. long, glabrous. — Mexico. 

 State of Chiapas: near Tumbala, altitude 1200 to 1650 m., 20 October, 

 1895, N. W. Nelson, no. 3314 (hb. Gr., and hb. U. S. Nat. Mus.). 



Urbinella, n. gen. of Composites (Tagetinece). Heads heterogamous, 

 radiate. Involucre campanulate ; bracts 1-seriate, free or very slightly 

 united at the base. Receptacle conical, naked. Ray-flowers imiseriate, 

 fertile. Disk-flowers regular ; tube slender, gradually ampliated above 

 into a 5-toothed limb. Anthers minutely toothed at the base, appendaged 

 at the apex. Style-branches sublanceolate-appendaged. Achenes of ray- 

 and disk-flowers' uniform, terete, many-striate. Pappus paleaceous of 

 5 to 7 scales, some or none awn-bearing. Small annuals with alternate 

 leaves. 



U. Palmeri. Glabrous throughout : stem 0.5 to 2 dm. high, simple 

 or much-branched, more or less purplish : leaves simple and undivided, 

 linear or subterete, 0.5 to 2.5 cm. long, obtusish, bearing 1-several 

 rather conspicuous glands, one of which usually occurs near the tip : 

 heads nodding or erect, 5 to 9 mm. high, including the rays 1 to 1.5 cm. 

 hi diameter, terminating the stem and branches on slender peduncles : 

 involucral bracts mostly 5, oblong or obovate-oblong, about 5 mm. long, 

 externally obtusely keeled along the median line, scarious-margined, 

 slightly lacerated or unevenly margined at the rounded tip, bearing 

 1-several roundish or elliptic-oblong glands : ray-flowers 5 ; tube slender, 

 2 nun. long ; rays white with a yellowish base, obovate or obovate cuneate, 

 5 to G nun. long, nearly or quite as broad: disk-flowers few to many (40 

 or less), light yellow : anthers narrowly appendaged at the tips : scales 

 of the pappus obovate-cuneate to lanceolate, one or two awn-bearing : 



