GKEENMAN. — 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-puberuleut 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 o, 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, iV'. W. Nelson, no. 3314 (hb. Gr., and hb. U. S. Nat. Mus.). 



Urbinella, n. gen. of Compositce {TagetinecE). Heads heterogamous, 

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

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

 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 simjile 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. 

 in 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 mm. long ; rays white with a yellowish base, obovate or obovate-cuneate, 

 5 to 6 mm. 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 : 



