BLAKE—NEW GENUS HEMIBACCHARIS, 553 
SPECIMENS EXAMINED: 
SraTte or Mexico: Bilimek 586° (N) ; Bourgeau 1228-(N) ; Purpus 1500 (N). 
Oaxaca: C. L. Smith 262 (N); Pringle 6051 (N). 
Curapas: Cerro del Boquerén, August, 1913, Purpus 6665 (type collection 
of B. seabridula; N). 
GUATEMALA: Mixco, 1840, Hartweg 589 (type collection of B. asperifolia ; 
Y, photo. N). Coban, von Tiirckheim 1354 (N), II. 1637 (N). Between 
San Martin and Todos Santos, Nelson 3617 (N). 
NICARAGUA: San Rafael del Norte, Miller & Griscom 24 (N), 86 (N). 
Distinguished by its large panicles of rather small heads (4 to 5 mm. high) 
and usually elliptic leaves, which are almost always scabrid above, and are 
more or less densely pubescent beneath. The pistillate heads contain 25 to 46 
pistillate flowers and 2 to 4 hermaphrodite; the staminate heads are 20 to 27- 
flowered. The type collection of Baccharis scabridula consists of both staminate 
and pistillate plants, the latter with tiny submature heads with rufous pappus, 
but it does not appear specifically distinct from the other collections examined. 
A staminate specimen of the type collection of Baccharis asperifolia, from the 
herbarium of the New York Botanical Garden, has been available for examina- 
tion through the kindness of Dr. N. L. Britton, confirming the identification of 
Bentham’s species. 
a 
15. Hemibaccharis corymbosa (Donn. Smith) Blake. 
Diplostephium corymbosum Donn. Smith, Bot. Gaz, 28: 8, 1897. 
TYPE LOcALITY : Todos Santos, Guatemala. 
SPECIMENS EXAMINED: 
GuaTEMALA: Todos Santos, Huehuetenango, altitude 3,050 meters, Decem- 
ber 26, 1895, Nelson 3639 (type; N). Hacienda de Chancol, Huehuete- 
nango, altitude 3,355 meters, January 2, 1896, Nelson 3644 (N). 
This species differs from ali others in the distinctly radiate heads, but 
may be included in the genus until more is known about it. The staminate - 
plant has not yet been collected. In several heads dissected the pistillate 
(radiate) flowers varied from 34 to 39; the hermaphrodite were always 4. 
The tube of the ray flowers is 2 mm. long, and the lamina linear-elliptic, 
entire or bidenticulate, whitish, 2.5 mm. long, 0.3 to 0.4 mm. wide, exceeding 
the style branches. The achenes of the ray flowers are trigonous, 3-nerved, 
somewhat glandular and hispidulous, 0.8 to 1 mm. long, with a scanty, fragile, 
1-seriate pappus. The achenes of the hermaphrodite flowers are 2 or 4- 
nerved, and apparently fertile. 
DOUBTIUL SPECIES. 
BACCHARIS ELEGANS SEEMANNIL Schultz Bip. in Seem. Bot. Voy. Herald 303. 
1856. 
This variety, based on Seemann 2015, was described as “ Var. B. Seemannii, 
Sz. Bip.; pubescens. Sierra Madre (n. 2015),” and the following note was 
added: “Oss. Ob flores centrales 1-2 capitulorum foemineorum hermaphro- 
ditos subgenus mihi est cum pluribus aliis speciebus e. g. B. asperifolia, 
Benth.! Pl. Hartweg. p. 86; B. hirtella, DC. Prod. vol. v. p. 418!” I have not 
seen the type, but all the specimens of B. elegans and its immediate allies 
examined have been without admixture of hermaphrodite flowers in the 
pistillate heads. 
*Hemsley (Biol. Centr. Amer, Bot. 2: 127. 1881) recorded this number and 
Bates 5 (not seen by me) as his 21st (unnamed) species of Conyza. 
