548 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
green, glabrous except for the puberulent costa, hispidulous on margin, beneath 
paler green, sparsely and obscurely puberulous along the veins with sub- 
glandular hairs, penninerved, the veins and veinlets usually impressed above, 
somewhat prominulous-reticulate beneath; heads in both sexes rather few 
(about 15) in a terminal corymbiform panicle about 6 cm. wide, the pedicels 
1 to 1.8 em. long, puberulous with erectish several-celled hairs; pistillate 
heads 7 to 8 mm. high, 5 to 8 mm. thick, the pistillate flowers about 48, the 
hermaphrodite 2; staminate heads 6 mm. high, 5 mm. thick, about 32-flowered ; 
involucres 4 to 5-seriate, graduate, 4.5 to 5.5 mm. high, the phyllaries linear- 
lanceolate, acuminate, green-centered, narrowly scarious-margined, ciliolate with 
subglandular hairs, otherwise essentially glabrous, subappressed; achenes 
(immature) compressed, subglabrous, the pappus 5 mm. long; style branches 
(hermaphrodite flowers) oblong-lanceolate, subacuminate, hispidulous. 
Type in the U. S. National Herbarium, no, 462582, collected in woodlands, 
at Honey Station, Hidalgo, Mexico, November 25, 1903, by C. G. Pringle 
(no, 11821). Duplicate in the Gray Herbarium. 
In this species, readily distinguished from H. hieracioides by its sparse 
incurved eglandular hairs, the main leaves often bear in their axils very 
short branchlets with two to several reduced leaves 8 to 20 mm. long. 
EXPLANATION OF PLATE 49.—Hemibaccharis simplex, from the type specimen, Natural 
81Ze, 
6. Hemibaccharis salmeoides Blake, sp. nov. PLATE 50, 
Shrubby climber, the stout, subterete, grayish-barked stem 5 mm. thick, the 
branches more or less zigzag, about 30 cm. long, sordid-hirtellous with in- 
curved brownish hairs, glabrate; internodes of branches 1.5 to 2.5 em. long, 
of main stem up to 12 em.; petioles incurved-hirtellous, naked, 6 to 13 mm. 
long; leaf blades oval or ovate-oval, 5.5 to 9 em. long, 3 to 4.5 em. wide, short- 
acuminate, mucronate, at base rounded-cuneate and often unequal, remotely 
mucronate-denticulate, firmly papery or pergamentaceous, above deep green, 
somewhat shining, hirtellous along costa, very sparsely so on surface or sub- 
glabrous, beneath deep dull green, obscurely hirtellous along costa and some- 
times along the 4 or 5 pairs of lateral veins, these curved-anastomosing, like 
the secondaries and finer veinlets prominulous-reticulate especially beneath; 
pistillate panicles axillary and terminal, rounded, 6 to 38-headed, 1.5 to 4.5 
em. wide, the sordid-hirtellous pedicels 2 to 83 mm. long; pistillate heads 5 to 6 
mm. high, the pistillate flowers 9, the hermaphrodite 1; involucre 3.5 mm. 
high, about 5-seriate, graduate, the phyllaries ovate (outer) to oblong or ovate- 
oblong, obtuse, appressed, lacerate-ciliate with sometimes gland-tipped hairs, 
glabrous dorsally, with dark green center and pale scarious margin; achenes 
compressed, 1.8 mm. long, 2-nerved, hispidulous; pappus rufidulous, 3.5 mm. 
long, the bristles slightly dilated above in the pistillate flowers, strongly so 
in the hermaphrodite; style branches (hermaphrodite flower) rhombic-oblong, 
acute, hispidulous. 
Type in the U. S. National Herbarium, no. 860862, collected at Coban, Alto 
Verapaz, Guatemala, altitude 1,250 meters, February, 1907, by H. von Tiirck- 
heim (no. II. 1641). Duplicate in the Gray Herbarium, Also collected by 
von Tiirckheim (no. II. 1657) at the same locality, March, 1907 (G). 
A strongly marked species, with much the habit of Salmea scandens (L.) 
DC. Both collections were distributed as Baccharis hirtella DC. Heyde & 
Lux 3389 (G, N), from Nebaj, Quiché, Guatemala, may be the staminate plant 
of this species. 
EXPLANATION OF PLATE 50.—Hemibaccharis salmeoides, from the type specimen. Natu- 
ral size. 
