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. 



i- Ultimate branchlets comparatively broad, 2-5 mm. wide, conspicuously 

 flattened, usually ascending and only moderately elongated; their leaves 

 3-5 mm. long. 



Lycopodium complanatum L. Branches mostly not over 3 dm. 

 long ; peduncles bearing 1-2 (-4) spikes ; tips of the lateral leaves 

 usually appressed or incurved. — Sp. PI. 1104 (1753), excl. citation of 

 Dill. Muse. t. 59 f. 3. — North America : Newfoundland to Alaska, 

 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. i. 

 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. ser. 2, ii. 707 (1902), not L. tkyoides H. & B. — Mexico : Chia- 

 pas; Bergwald zwischen San Cristobal Las Casas und Huitztan, C. & E. 

 Seler, no. 2273; Chiapas "etc.," Ghiesbregkt, no. 600; Oaxaca, Cerro 

 San Felipe, alt. 2000 m., Gonzalez & Conzatti, no. 889 ; region d'Ori- 

 zaba, Bourgeau, no. 3159, in part; Hidalgo, Trinidad, C. G. Pringle, 

 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 conspicu- 

 ously flattened, somewhat convex above, sometimes much elongated (to 

 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. thyoi- 

 des H. & B. in Willd. Sp. PI. v. 18 (1810) ; ?HBK. Nov. Gen. et Sp. i. 

 38 (1815); Presl, Rel. Haenk. 77 (1825) ; Raddi, Fil. Bras. 80 (1825), 

 at least in part. L. complanatum fi adpressifolium Spring, Monog. 

 Lycopod. i. 102 (1842), excl. syn. L. anceps Wallr. L. complanatum, 

 "var. L. tkuyoides HBK." Baker, Handb. of the Fern Allies, 28 (1887). 

 L. complanatum, var. tkyoides Hieron. Engl. Bot. Jahrb. xxxiv. 576 

 (1905). — Colombia: Moritz ; Santa Marta, Purdie. Ecuador: in 

 Andibus quitensibus, Jameson; Andibus, Spruce, no. 5412 (a doubtful 

 plant which seems to have suffered some injury to its leaves). Peru : 



