MAXON—STUDIES OF TROPICAL AMERICAN FERNS. 177 
Lycopodium guatemalense Maxon, sp. nov. PLATE 9, a. 
A delicate, diffuse, pendent epiphyte, 20 cm. long, 7 or 8 times dichotomous, inter- 
ruptedly sporangiate in the apical half or two-thirds. Stem very slender (about 
0.6 mm. in diameter), dull vermilion, the numerous branches of the same color, 
slender (0.3 to 0.5 mm. in diameter), slightly flexuous nearly throughout; leaves dis- 
tant, borne in 6 or 8 ranks, spreading, strongly falcate, dull green, delicately mem- 
brano-herbaceous, very narrowly linear-lanceolate, 8 to 10 mm. long, 0.6 to 0.8 
mm. broad, long-attenuate (the tips pungent, often reddish), entire, all somewhat 
twisted near the base, flat or the lower surface concave in drying, the leaf sometimes 
even subtubulose; costa medial, percurrent, visible upon the upper surface only near 
the tip (its course elsewhere marked often by a narrow furrow), evident beneath except 
toward the tip, the lower surface thus delicately carinate nearly throughout, the costa 
reddish at the base, strongly elevated, and together with the reddish leaf tissue long- 
decurrent upon the stem; sporophyls conform, arranged in zones 2 to 4 cm. long; 
sporangia suborbicular-reniform (the sinus rather shallow), averaging about 1 mm. 
broad, protruding beyond the twisted bases of the sporophyls a distance of 0.3 to 0.35 
mm. on each side. 
Type in the U. S. National Herbarium, no. 827041, collected upon tree trunks at 
Pansamald, Alta Verapaz, Guatemala, altitude about 1,200 meters, July, 1886, by H. 
von Tiirckheim and distributed by Capt. John Donnell Smith as no. 957, Lycopodium 
linifolium var. sanguineum Spring. 
Allied to Lycopodium linifolium L. and the Costa Rican L. wnderwoodianum Maxon? 
(Pl. 9, b); differing conspicuously from the former in its red stems, lesser size and 
more slender, strongly falcate leaves. From the latter it is readily distinguished by 
its reddish stems throughout, its lesser size and its much darker and broader leaves. 
Although a lax plant, it is much less so than L. wnderwoodianum, which is the most 
delicate species of the entire genus. 
EXPLANATION OF PLATE 9.—Portions of type specimen of (a) Lycopodium guatemalense; (b) L. under- 
woodianum ( Mazon 213). Both natural size. 
Lycopodium lancifolium Maxon, sp. nov. 
Plants epiphytic, pendent, 20 to 30 cm. long, 5 to 8 times dichotomous, the branches 
laxly disposed, discontinuously sporangiate in the apical part. Stems slender (0.5 to 
0.7 mm. in diameter), stramineous to light greenish, straight or nearly so, only partially 
concealed by the leaves; leaves yellowish green, herbaceous, ascending but not at all 
appressed, borne in 6 ranks, somewhat dorsiventrally arranged, those of the 4 lateral 
and upper rows more or less twisted at the base, those of the 2 under rows straight, 
the leaves otherwise all alike, narrowly lanceolate, attenuate, 7 to 10 mm. long, 1 to 
1.5mm. broad, slightly falcate in the outer part, entire, flat or the upper surface slightly 
convex; costa percurrent, nearly concealed above, visible in the outer part only by 
transmitted light, apparent below in the basal half of the leaf as a distinct ridge, the 
strongly carinate base decurrent, the stem thus appearing sharply angled; sporophyls 
similar to the sterile leaves but mostly smaller (5 to 7 mm. long), and slightly broadest 
at the base; sporangia orbicular-reniform, about 0.9 mm. broad. 
Type in the U.S. National Herbarium, no. 676072, collected from the fallen branch 
of a large tree in dense humid forest along the upper Caldera River, near “‘Camp I,” 
Holcomb’s trail, above El Boquete, Chiriqui, Panama, altitude about 1,650 meters, 
March 23, 1911, by William R. Maxon (no. 5627). Other specimens (Mazon 5638) 
were gathered in the same vicinity at a slightly greater elevation. 
Lycopodium lancifolium is allied to L. linifolium, but differs materially in its more 
slender, more sharply angled and less herbaceous stems, and especially in having the 
leaves very much shorter, relatively much broader (truly lanceolate instead of linear 
1 Contr. U. 8S. Nat. Herb. 18: 41. 1909. 
