CONTRIBUTIONS FROM THE GRAY HERBARIUM OF HARVARD 
UNIVERSITY, NEW SERIES.—NO. XXVIII. 
Presented by B. L. Robinson, February 10, 1904. Received February 27, 1904. 
I. — REVISION OF THE GENUS SABAZIA. 
B. L. Rosprnson AND J. M. GREENMAN. 
Sabazia is a small and exclusively American genus of the Helianthoideae. 
It is chiefly Mexican in its distribution, although one of its species ranges 
as far south as Ecuador. It is circumscribed here as by Bentham and 
Hooker, f., Gen. Pl. ii. 194, and by Hoffmann in Engl. & Prantl, Nat. 
Pflanzenf. iv. Ab. 5, 228, 233, the leading characteristics and literature 
of the genus being as follows: — 
SABAZIA, Cass. (Name of obscure origin.) — Heads 1 to many, 
6 mm. to 4 em. in diameter (including the rays) ; involucral scales ovate, 
mostly obtuse, subequal, 2~3-seriate ; disk convex or conical, chaff-bear- 
ing. Flowers all fertile. Corollas of the disk-flowers cream-colored to 
light yellow, shortly 5-toothed; ligules of the ray-flowers 2 to 20 mm. 
long, white to (externally) deep purple, 3-toothed. Achenes narrowly 
obovate, 4-5-angled, rounded at the summit; pappus none or of a few 
minute caducous awns. — Branching annual or perennial herbs, leafy- 
stemmed and often decumbent. Leaves opposite, ovate, entire or serrate. 
— Dict. Sci. Nat. xlvi. 480 (1827); DC. Prodr. v. 496; Hemsl. Biol. 
Cent.-Am. Bot. ii. 160. Baziasa, Steud. Nom. ed. 2, i. 192 (1840). 
Sabbazia, Steud. 1. ¢. ii. 489 (1841). — A genus of plants which are 
without doubt rather nearly related, but which still may not have had a 
very recent common origin. In habit the species approach on the one 
hand Jaegeria and on the other 7ridax and Galinsoga. 
* Annuals. 
+ Achenes hispidulous. 
S. urticaefolia, DC. Hispid-pubescent throughout, glandular. 
about the inflorescence: heads several to many, small, (including the 5 
short roseate rays) only 6 mm. in diameter. — Prodr. v. 497 (1836); 
Hemsl. Biol. Cent.-Am. Bot. ii. 161. Galinsoga urticaefolia, Benth. in 
