414 PROCEEDINGS OF THE AMERICAN ACADEMY. 
The following synopsis will serve to define these American tenden- 
cies of L. complanatum, as understood by the writer. The specimens 
cited are all in the Gray Herbarium. 
* Branchlets ascending, or, if spreading, lax and irregular; ultimate branch- 
lets often more or less elongated. 
+ Ultimate branchlets comparatively broad, 2-5 mm. wide, conspicuously 
flattened, usually ascending and only moderately elongated; their leaves 
3-5 mm. long. 
Lycopopium compLaNatumM L. Branches mostly not over 3 dw. 
long ; peduncles bearing 1-2(-4) spikes; tips of the lateral leaves 
usually appressed or incurved. — Sp. Pl. 1104 (1753), excl. citation of 
Dill. Muse. t. 59 f. 3. — Norra America: Newfoundland to 
south to Maine and northern Idaho. Also in Eurasia. 
Var. validum, nom. nov. More robust ; branches usually 3-4.5 dm. 
long ; peduncles bearing 4-6(-9) spikes; tips of the lateral leaves 
conspicuously spreading. — L. complanatum Fourn. Enum. Pl. Mex. 1. 
146, at least in part, not L.; Hemsl. Biol. Cent.-Am. Bot. iii. 701, at — 
least in part, not L. L. complanatum, var. thujoides Christ, Bull. Herb. . 
Boiss. sér. 2, ii. 707 (1902), not L. thyoides H. & B. — Mexico: Chia- 
pas; Bergwald zwischen San Cristobal Las Casas und Huitztan, 0. & £ 
Seler, no. 2273; Chiapas “etc.,” Ghiesbreght, no. 600; Oaxaca, Cerro 
San Felipe, alt. 2000 m., Gonzalez &: Conzatti, no. 889; region d’On- 
zaba, Bourgeau, no. 3159, in part; Hidalgo, Trinidad, C. @. Pringls 
no. 11,856 (a form with the ultimate branchlets lax, elongated, and 
somewhat attenuate at tip). No. 3196 in John Donnell Smith’s Plants 
of Guatemala shows a form intermediate between this and the following 
variety. 
+ + Ultimate branchlets narrow, not more than 2 mm. wide, less conspire 
ously flattened, somewhat convex above, sometimes much elongated (to 4 
12 cm.) and loosely spreading; their leaves 2-3 mm. long, the tips usually 
closely appressed. 
Var. Tropicum Spring in Mart. Fl. Bras. i. pt. 2, 116 (1840). L. thy : 
des H. & B. in Willd. Sp. Pl. v.18 (1810) ; ?HBK. Nov. Gen. et ae 
38 (1815) ; Presl, Rel. Haenk. 77 (1825) ; Raddi, Fil. Bras. 80 (182 ) 
at least in part. JZ. complanatum B adpressifolium Spring, er 
LD. com. pitti 
“var. L. thuyoides HBK.” Baker, Handb. of the Fern Allies, 28 gi : 
Andibus quitensibus, Jameson ; Andibus, Spruce, no. 5412 Pel 
plant which seems to have suffered some injury to its leaves). — | 
