300 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
extending about halfway to the margin, composed of cells with distinctly 
thickened and pitted walls; mycorhiza often present; ventral scales ovate to 
lunulate, deeply pigmented throughout or with hyaline borders, in the latter 
case often with more or less persistent slime papillae; cells containing oil 
bodies mostly 15 to 20, scattered, tending to be more numerous in the acropetal 
portion; appendages borne singly or in pairs, sometimes bleached out, slightly 
or not at all contracted at the base, narrowly lanceolate or subulate, mostly 
0.8 to 1 (rarely only 0.5) mm. long and 0.13 to 0.18 (rarely only 0.1) mm. 
wide, acuminate, entire or nearly so, the cells mostly 70 X 40 w; inflorescence 
auloicous; male inflorescence borne on a very short and slightly expanded 
ventral branch, consisting of a small and not clearly defined cluster of an- 
theridia with occasional narrow paleae at the edge; ostioles short but distinct ; 
female inflorescence borne on a very short (rarely slightly elongated) ventral 
branch, more expanded than the male branch and often obcordate; peduncle 
more or less pigmented with purple, pilose in the upper part, especially at the 
apex, becoming naked below, mostly 1 to 2 em. high; disk of receptacle mostly 
2.5 to 3.5 mm. across, covered with low tubercles, those of the lobes often 
larger and more conspicuous than those of the hemispherical disk, the lobes 
mostly 4, distinct, spreading obliquely downward, the margins crenate, the in- 
volucre rather broad, entire or sinuate, slightly indented in the middle but 
scarcely bilobed; pseudoperianth white or rarely purplish, mostly 8 to 10-cleft 
{rarely up to 12-cleft), the divisions extending about halfway to the base, 
lanceolate, connate at the apex; capsule as in A. clegans ; spores pale yellowish 
brown to dark purplish brown, mostly 90 to 120 w in diameter, with Wavy wings 
10 to 20 uw wide along the edges, the margins of the wings often more deeply pig- 
mented and very minutely crenulate; the entire surface of spore minutely and 
densely punctulate but nowhere with distinct lines, the spherical face showing 
in addition a coarse and sometimes regular reticulum, the meshes mostly 18 to 
20 w across, inclesed by a system of thin ridges similar to the wings but only 
6 to 8 uw wide, very rarely involving the wings, the plane faces with similar 
reticula; reticula often very irregular and incomplete, especially on the plane 
faces; elaters brown, the color sometimes affecting the thin parts of the wall, 
variously curved, mostly 200 to 240 # long and 12 to 14 (sometimes up to 22) w 
wide, scarcely tapering toward the blunt ends, usually with 2 spirals in the 
median portion for about one-third the length of the elater and 1 spiral at 
each end. 
On banks, Mexico, Costa Rica (?), and Ecuador. The following specimens 
have been examined: 
FEDERAL District or Mexico: Near Toluca, 1908, Rose & Painter (Y.); 
Amecameca, Pringle 10674 (Y.; distributed by Pringle in Pl. Mex. as Fimbri- 
aria austini), Barnes & Land 340 (Y.); Cafiada Santa Magdalena, Contreras, 
Barnes & Land 429, 
JaLisco: Rio Blanco, 16 kilometers from Guadalajara, 1908, Barnes & Land 
220 (Y.). 
Lower CALirorNIA: Without definite locality, 1890-92, 7. 8. Brandegee 38, 5, 
8 (N. Y.; listed as F. echinella by Brandegee in Proc. Calif. Acad. IT. 3: 182, 
1891 ; also, as A. elegans, by Underwood in Bot. Gaz. 20: 68. 1895). 
MoretLos: Pasque, near Cuernavaca, 1908, Pringle 15320 (Y.; distributed by 
Pringle in Pl. Mex, as Fimbriaria bolanderi Aust. ?). 
Puesia: Santa Barbara, near Puebla, 1909, Frére Nicolds 1 (Y.). 
San Luis Porosf: Without definite localities, Parry & Palmer (N. Y.); in 
1876, Schaffner 4 (N. Y.). 
Srvatoa: Colomas, foothills of the Sierra Madre, 1897, Rose (N. Y.; type). 
Tepic: Tepic, Sierra Madre, 1897, Rose (N. Y.; listed by Howe), 
