A NEW SELAGINELLA FROM MEXICO 
J. M. GREENMAN 
Curator of the Herbarium of the Missouri Botanical Garden 
Professor in the Henry Shaw School of Botany of 
Washington University 
AND NORMA E. PFEIFFER 
Assistant Professor of Botany in the University of North Dakota 
In a collection of plants made in southern Mexico in 1908 by 
Dr. W. J. G. Land and the late Professor Charles R. Barnes 
was a Selaginella which it was impossible at that time to de- 
termine with any degree of certainty. Subsequently addi- 
tional material was obtained and a further attempt was made 
to identify the plant with some known species, but again with- 
out success. Material was then sent to Professor Georg 
Hieronymus, of Berlin, whose extended studies of the genus 
had given him a comprehensive knowledge of the entire group. 
Professor Hieronymus stated that the plant did not corre- 
spond to anything in the Royal Herbarium of Berlin, and that 
it undoubtedly represented a species new to science. The 
authors take pleasure in dedicating this well-marked species 
to Professor W. J. G. Land, of the University of Chicago, and 
present herewith a description and illustrations as follows: 
Selaginella Landii Greenman & Pfeiffer, sp. nov. 
Herba cespitosa perennis 3-6 cm. vel ultra longa; caule 
ramibusque prostratis apicibus aliquanto adscendentibus 
foliosissimis remote radicantibus; foliis crebre pluri-seriatis 
sub ima parte caulis plus minusve adpressis sed maximam 
partem adscendentibus vel erectis ovato-lanceolatis vel 
triangulato-ovatis 1-2.5 mm. longis 0.5-1 mm. latis acumi- 
natis vel aeutis ciliatis utrinque glabris supra planis subtus 
parum convexis et in sicco fere usque ad apicem secus lineam 
tenuiter suleatis; spicis (strobilibus) terminalibus 0.5-1 em. 
longis erectis vel suberectis tetragonis circiter 1.5 mm. dia- 
metro; sporophyllis late ovatis cordatis foliis paulo breviori- 
bus; mierosporis parce brevi-spinulosis vel papillosis aur- 
anteo-luteis circiter 46 д in majore diametro; megasporis 
ANN. Мо. Bor. GARD., VoL. 5, 1918 (205) 
