546 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM, 
Plants erect, not scandent, herbaceous or frutescent; branches straight ; 
heads in large terminal panicles. 
Stem densely puberulous, hirtellous, or sordid-pubescent, sometimes 
tomentose. 
Pubescence cinereous or griseous; heads 3 to 4 mm. high. 
Pubescence of stem and upper leaf surface harsh; leaves not 
densely tomentose beneath ______________ 10. H, mucronata. 
Pubescence usually soft; under leaf surface and often the stem 
densely tomentose___-______ 10a. H. mucronata paniculata. 
Pubescence sordid. subglandular; heads 4.5 to 5 mm. high. 
11. H. irazuensis. 
Stem glabrous or essentially so, at least below, and often glaucescent, 
rarely thinly arachnoid. 
Leaves oval or ovate-oval, the larger 3 to 6 cm. wide. 
12. H. sescenticeps. 
Leaves narrowly lanceolate to elliptic or oblong, the larger 1 to 3.5 
cm. wide. 
Leaves narrowly lanceolate, glabrous________ 13. H. androgyna. 
Leaves chiefly elliptic, pubescent, at least on the veins beneath, 
14, H. asperifolia. 
Lamina of the pistillate corollas 2.5 mm. long, spreading__ 15. H. corymbosa. 
1. Hemibaccharis glandulosa (Greenm.) Blake. 
Baccharis glandulosa Greenm. Proc, Amer. Acad. 40: 36, 1904. 
TYPE LOCALITY: Serrania de Ajusco, Federal District, Mexico. 
SPECIMENS EXAMINED: 
PuERLA: Boca del Monte, 1907, Purpus 2792 (G, N). 
STATE OF Mexico: Desierto Viejo, Valley of Mexico, 1865, Bourgeau 1230 in 
part (N). Sierra de las Cruces, altitude 3,050 meters, 1899, Pringle 
7709 in part (N). 
IFeperAL Districr: Serrania de Ajusco, altitude 2,895 meters, December 7, 
1903, Pringle 8782 (type collection; N). 
This herbaceous species is characterized by its densely glandular-pubescent 
stem, and lanceolate to elliptic leaves gradually narrowed into an amplexicaul 
base. The pistillate heads contain about “100 to 120” pistillate flowers, and 
1 to “15” hermaphrodite. Pringle 7709, as represented in the National Her- 
barium, consists of two specimens, one with the amplexicaul leaf bases of this 
species, the other referable to H. hieracioides. Bourgeau 1230, in the National 
Herbarium, is H. glandulosa; the specimen of this number in the Gray Her- 
barium, however, is H. hieracioides. The two species may perhaps be Identical, 
but are best kept distinct until further evidence is available. 
2. Hemibaccharis oaxacana (Greenm.) Blake. 
Baccharis oaxacana Greenm. Proc. Amer. Acad. 40: 37. 1904. 
TYPE LOCALITY: Sierra de San Felipe, Oaxaca. 
SPECIMENS EXAMINED: 
Oaxaca: Sierra de San Felipe, altitude 2,895 meters, December 13, 1895, 
Pringle 6257 (type collection; G, N); August 3, 1894, Pringle 5669 
(G). 
Related to H. glandulosa, but distinguished by its broader leaves, rather 
abruptly contracted into a margined amplexicaul base. In this species the 
staminate heads bear “5” to 12 filiform pistillate marginal flowers. 
