FERNALD. — LITTLE KNOWN MEXICAN PLANTS. 415 
Andes, Jameson. Botivia: Yungas, Bang, no. 395. Braz: Riedel ; 
Claussen ; Herb. U. 8. So. Pac. Expl. Exp., no. 27; Prov. Minas Ge- 
raes, Widgren, no. 9844. Burchell’s no. 2223, from Brazil, of which 
the specimen in the Gray Herb. shows only the tip of a stem, is per- 
haps referable to var. validum. 
** Branchlets spreading or recurved, forming a regular Alabelliform spray; 
ultimate branchlets usually short, 0.5 to 4 em. long, broad as in L. com- 
planatum but with shorter leaves. 
Var. FLABELLIFORME Fernald. Peduncles usually bearing 4 spikes. 
— Rhodora, iii. 280 (1901). Z. complanatum Amer. auth. in part. — 
Norta America: Nova Scotia to the mountains of North Carolina, 
Kentucky, Iowa, and Minnesota. 
Var Wisset Haberer. Peduncles 1-spiked. — Rhodora, vi. 102 
(1904). Norra America: northern Vermont and central New York. 
IV. NEW AND LITTLE KNOWN MEXICAN PLANTS, 
CHIEFLY LABIATAE. 
By M. L. FrEerna.p. 
Juncus albicans, n. sp., caespitosus ; caulibus 5-7 dm. altis tenu- 
ibus striatis albido-viridibus ; vaginis basilaribus laxis albicantibus 
demum fuscis, auriculis cartilagineis, laminis subteretibus anguste 
canaliculatis ; inflorescentiis decompositis 2-6 cm. longis, ramis sub- 
erectis, floribus subremotis vel aggregatis; bractea infima frondosa 
inflorescentiam plerumque superante ; floribus 4-5 mm. longis albido- 
stramineis ; bracteolis tenuibus albicantibus ; sepalis petalisque subae- 
quilongis patentibus lanceolatis apice subulatis anguste membranaceo- 
maarginatis ; staminibus 6 sepalis circa dimidio brevioribus, antheris 
filamentisque aequantibus; fructibus trigono-ellipsoideis truncatis 
breve mucronatis 3-4 mm. longis pallide stramineis nitidis ; seminibus 
0.5 mm. longis oblique ellipsoideis brevissime albo-caudatis. — Cu1- 
HUAHUA : vicinity of Chihuahua, altitude about 1300 m., May 1-21, 
1908, Edward Palmer, no. 161 (type, in Gray Herb.). [It should be 
noted that two plants have been distributed under no. 161, but, as the 
other belongs in the Cruciferae, little confusion is likely to result. ] 
Nearly related to J. dichotomus Ell. of the southern and eastern United 
States. Differing in its very pale color, the softer texture of the pro- 
Heim perianth, and capsule, and the distinctly white-caudate longer 
8 
Palmer’s no. 253, collected May 28-31, 1906, at Tobar, Durango, is 
provisionally placed with Juncus albicans, though it may eventually 
