BLAKE—NEW GENUS HEMIBACCHARIS, 549 
7. Hemibaccharis hirtella (DC.) Blake. 
Baccharis scandens Less. in Schlecht. & Cham. Linnaea 5: 146, 1830. Not B. 
scandens (Ruiz & Pav.) Pers. 1807. 
Baccharis hirtella DC. Prodr. 5 : 418. 18386. 
Baccharis schiedeana Benth. in Oerst. Naturh. For. Kj6benhavn Vid. Medd. 
1852: 83. 1852. 
Baccharis thomasii Klatt, Abh. Naturf. Ges. Halle 15: 326. 1882. 
TYPE LOCALITY: Mexico. Type collected by Haenke. 
SPECIMENS EXAMINED: 
Teric: In 1892, Palmer 1846 (N). 
Veracruz: Near Jalapa, Schiede 318 (fragm. of type of B. scandens; G) ; 
Pringle 6108 (N). 
STATE OF MExIco: Bourgeau 955 (N) ; Purpus 18 (N), 1499 (N). 
FEDERAL District: Pringle 11483 (N). 
Morextos: Pringle 9853 (N). 
GUERRERO: Nelson 2237 (N), 2238 (N). 
Oaxaca: Pringle 4988 (N); C. £. Smith 259 (N); Nelson 1471 (N), 
2236 (N). 
Mexico (without definite locality) : Ehrenberg 1408 (N). 
This common species is well distinguished by its scandent habit and usually 
strongly zigzag branches, its elliptic or ovate membranous leaves, and its tiny 
heads in usually small rounded cymes or panicles, terminating the branchlets, 
The attempts which have been made to distinguish B. scandens and B. hirtella 
are not supported by the specimens distributed under those names or by the 
original descriptions of the two supposed species. Fragments of the type of 
Lessing’s Baccharis scandens have been examined in the Gray Herbarium. 
De Candolle’s description is less clearly applicable, but probably refers to the 
same species, and the traditional use of this name has been followed. Ben- 
tham’s B. schicdeana was a mere renaming of B. scandens Less. non Pers, 8. 
thomasii Klatt, from description, seems referable to this species. It was de- 
scribed from material collected at Orizaba in 1866 by Thomas. 
8. Hemibaccharis flexilis Blake, sp. nov. 
Frutescent, scandent, the slender stem densely sordid-pilose with many- 
celled, crisped, spreading hairs, glabrescent below; internodes 3 to 11 cm. long; 
petioles naked, sordid-pilose, 2 to 5 mm. long; leaf blades elliptic, lance- 
elliptic, or ovate-elliptic, 3.5 to 7 cm. long, 1.3 to 3 cm. wide, acuminate, at 
base rounded or cuneate, remotely serrate to subentire, submembranaceous or 
papery, above deep green, puberulous along costa and sometimes along the 
veins, hispidulous on margin, beneath equally green, evenly but sparsely 
sordid-pilosulous on surface, densely so along veins, feather-veined or weakly 
triplinerved, the lateral veins about 4 pairs, impressed above, prominulous be- 
neath, the secondaries in age somewhat prominulous; panicles small, numerous, 
axillary and terminal on the branchlets, about 2 to 3 cm. wide, densely sordid- 
pilosulous, the pedicels 2 to 5 mm. long; pistillate heads 5.5 to g@ mm. high, 
the pistillate flowers 16, the hermaphrodite 1 or 2; staminate heads 5 mm. 
high, 8-flowered; involucres 3.5 to 4 mm, high, about 5-seriate, graduate, the 
linear or (outer) linear-lanceolate phyllaries acute, green-centered with whit- 
ish margins, somewhat ciliolate, the outermost sordid-puberulous; hermaph- 
rodite corollas with 5-parted limb, the style branches linear-oblong, obtuse 
or acutish: achenes compressed, hispidulous, 2 or 38-nerved, 1.3 mm. long, 
their pappus 1-seriate, brownish-tinged, 3.5 mm. long; bristles of hermaphro- 
dite pappus obscurely dilated at apex. 
Type (pistillate plant) in the U. S. National Herbarium, no. 860860, col- 
lected at Cobin, Alta Verapaz, Guatemala, altitude 1,350 meters, March, 1908, 
