4294 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Type in the U. S. National Herbarium, no. 691549, collected upon the Volcan de 
Barba, Costa Rica, August 28, 1855, by Dr. C. Hoffmann (no. 85). 
Hieronymus ! has listed this number under Lycopodium affine Hook. & Grev., here 
renamed L. blepharodes Maxon, remarking that it differs slightly in its shorter-dentic- 
ulate leaves. The differences, however, are pronounced and clearly entitle this 
Costa Rican plant to recognition as a distinct species. It departs widely from L. 
blepharodes in habit, in having the leaves and sporophyls smaller, less deltoid, less 
concave, and not at all strongly carinate, and particularly in the character of the 
margins. The leaves and sporophyls of L. blepharodes are conspicuously long-ciliate 
throughout, while no cilia whatever occur in L. hoffmanni. The difference in habit 
is equally pronounced, L. blepharodes being unmistakably 2 pendent epiphyte and 
L. hoffmanni a plant of erect growth, presumably terrestrial. The general habit of 
L. hoffmanni is exactly that of the common tropical American L. reflexwm Lam., a 
species which otherwise it does not closely resemble. That species occurs invariably 
upon the ground, either in half-shaded thickets or upon open banks or even on cliffs: 
while L. hoffmanni has the appearance of a plant growing among litter of the forest 
floor, like L. montanum Underw. & Lloyd, of Jamaica, and L. hippurideum Christ, of 
Costa Rica and western Panama. 
A single additional specimen of L. hof’manni has been seen: 
Costa Rica: Forest of Vole4n de Barba, alt. 2,000 meters, February 6, 1890, 
Tonduz 1990 (determined by Christ as L. attenuatum Spring). 
Lycopodium regnellii Maxon, sp. nov. PLATE 23. 
Plant probably terrestrial, stout, rigidly erect from a decumbent base, 4 or 5 times 
dichotomous, the numerous apical branches closely fasciculate and almost contin- 
uously sporangiate. Stem woody, about 4 mm. in diameter at the base; leaves in 
the basal half of the plant mostly divaricate or even reflexed in drying, arranged in 
10 to 12 ranks, crowded and nearly concealing the stem, radial, straight or nearly so, 
lance-subulate, 7 to 10 mm. long, 1.3 to 1.6 mm. broad at the base, thence gradually 
and evenly long-acuminate, pungent, rigidly coriaceo-herbaceous but relatively 
thin, flattish, strongly costate throughout (the leaf narrowly carinate ventrally, more 
obtusely se upon the upper surface), the margins hyaline, subentire or very minutely 
sinuate; ultimate branches fertile, 4 to 5 mm. in diameter (including sporophyls), 
the sporophyls similar to the leaves of the lower branches but smaller (3 to 5 mm. long) 
and more abruptly and sharply long-acuminate: sporangia orbicular-reniform, 1 to 
1.4 mm. broad. , 
Type in the U. S. National Herbarium, no. 201172, collected in the vicinity of 
Caldas, province of Minas Geraés, Brazil, October 21, 1868, by A. F. Regnell 
(ITI.1500). 
Lycopodium regnelliit is a member of the selago subgroup and is apparently well 
distinguished from related South America species by the contrasting direction of the 
leaves and sporophyls, the former being strongly divaricate from the stems, the latter 
imbricate and closely appressed. Only the type specimen has been seen. 
EXPLANATION OF PLATE 23.—From a photograph of the type specimen. Slightly more than one-half 
natural size. 
Lycopodium hippurideum Christ in Pittier, Prim. F]. Costar. 31:56. 1901. 
This species, known previously only from the high mountains of Costa Rica (Pittier . 
10619; Tonduz 1989) was collected in quantity by the writer, in 1911, at the edge oi 
moist woods above Fl Potrero Camp, Chiriqui Volcano, Panama, altitude 2,900 
meters ( Maron 5375). 
Lycopodium pithyoides Schlecht. & Cham. Linnaea 5: 623. 1830. 
Since the publication of Underwood and Lloyd’s article upon the tropical American 
species of Lycopodium? this species has been collected at J alapa, Mexico, the type 
Bot. Jahrb. Engler 84: 571. 1905. 2 Bull. Torrey Club 88: 101-124. 1906. 
