2l6 
AMERICAN JOURNAL OF BOTANY 
[Vol. 8 
short-pediceled, with the pedicels scarcely i mm. long, hypogynous, 5- 
androus, the filaments shorter than the rather large anthers; ovary minute, 
ovoid; stigmas 3, sessile. — Plate VII, figure 2. 
Western Sierra Madre of Mexico (El Muleto, Langlasse 215, the type). 
Piper abalienatum n. sp. 
Dingy-villous or pubescent throughout, the puberulous older branches 
pale; leaves round-ovate or subquadrate, short-acuminate, truncately 
rounded or shallowly truncate-cordate at base, comparatively large (7.5 X 
7.5-16 X 18 cm.), palmately 9- or ii-nerved; petiole rather short (15 mm.); 
spikes elongated (130 mm.); peduncle rather short (15 mm.); bracts spatu- 
late; flowers rather long-pediceled, the pedicels up to 2 mm. long, 5- or 
6-androus, the short filaments adnate nearly to the middle of the flask- 
shaped ovary; stigmas 3, on a constricted style nearly as long as the ovary; 
berries subglobose, surmounted by the stout style. — Plate VIII, figure i. 
Western Sierra Madre of Mexico (Colima, Palmer 100, the type). 
Piper albicaule n. sp. 
More or less persistently gray-tomentose or pubescent throughout, 
branches for a time silvery from the detaching epidermis; leaves subquad- 
rate-orbicular, rather abruptly long-acuminate, truncate at base, rather 
small (5.5 X 7-8.5 X 9 cm.), palmately about 9-nerved; petiole short 
(10 mm.); spikes elongated (100 mm.); flowers long-pedicellate, the pedicels 
up to 2 mm. long, 5- or 6-androus, the very short filaments adnate nearly 
to the middle of the ovoid ovary; stigmas 3, on a conical style half as long 
as the flowering ovary but becoming obliterated as the subglobose berry 
enlarges. — Plate VIII, figure 2. 
Western Sierra Madre of Mexico (Santa Rosa near Aguila, Langlasse 
248, the type). 
The University of Illinois, 
Urbana 
REFERENCES 
1. De CandoUe, C. In DC, Prodromus 16'^: 240. 1869. 
2. . A manuscript of 64 pages, with an exhaustive supplementary key to 232 species; 
for the privilege of using which I am indebted to Mr. W. R. Maxon of the United 
States National Herbarium. 
3- • In Urban, Symbolae Antillanae 3: 159. 1902. 
4- . Smithsonian Miscell. Coll. 2579. 1920. Botanical Gazette 70: 169. 1920. A 
key to the recorded Mexican species is included by Mr. Standley in his recently pub- 
lished Trees and Shrubs of Mexico in Contr. U. S. Nat. Herb. 23I: 145. 
5. Piper jaliscanum Sereno Watson, Proc. Amer. Acad. 26: 145. 1891. 
Piper Palmeri C. DC. Contr. U. S. Nat. Herb, i: 354. 1895. 
EXPLANATION OF PLATES 
Habit figures are of natural size; flowers or fruit X 10. 
Plate V 
Fig. I. Piper Muelleri, the type collection. • - - 
Fig. 2. Piper Thiemeanum, the type collection. 
Plate VI 
Piper brackypus, the type collection. 
