262 BOTANICAL GAZETTE [APRIL 
problem whether the *type" of the Linnean genus Comummelima was some 
species of DZdymwon or some species of /4omoom. Then there would be a 
question whether he had a type; or, if. not, which was the /£zs/ species he 
regarded as a Cowsmelima. We should thus have had one set of botanists 
adopting the two genera Cozuue/ina and. Monoon, another set those of DZy- 
oon and Comzelina, with two new names for each of the ninety species of 
Commeiina. 'The case of DONNELLIA differs; treating it as a genus alters 
the name of no other existing species. 
EXPLANATION OF PLATE XI.—FiG. r, habit. — Fr1G. 2, cyme in fruit.— 
F1G. 3, flower.— F1G. 4, sepal.— F1G. 5, petal.— FIG. 6, perfect stamen.— 
F1G. 7, imperfect stamen.— FG. 8, pistil.— FIG. 9, capsule.— FIG. 10, cross 
section of capsule.— FG. 11, anterior and posterior views of seed.— 7723s. 7 
and 2 are natural size; the others are variously enlarged. 
Polypodium Alfari Donn. Sm. (S EurorvropiuM).— Frons 
parva pendula glabra pinnata linearis deorsum paulatim atten- 
uata, pinnis utrinque 15-35 adnatis contiguis triangularibus 
vel e basi triangulari linearibus integris margine superiore ad 
basin dilatato angulo recto patentibus, inferiore decurrentibus, 
venis simplicibus paucis brevissimis in pinnarum dimidia parte 
exteriore nullis, soris 1-6 costae approximatis. 
Stipites fasciculati filiforms arcuati castanei inferne pilis patentibus vestiti 
1.5-2.5"" longi. Frons membranacea 10-20*" longa 1.5—4." lata, rhachi 
ebenea. Pinnae distinctae alternae medio 2-3"? latae, inferiores laxiores, 
infimae ad alas cuneatas reductae, costa ebenea infra apicem evanescente, 
vena basali superiore ceteris longiore obsolete sorifera, soris majusculis 
rotundis, extimis ad costam subimpositis, paraphysibus nullis.—7Z. cagzZ/arz 
Desv. proximum.—Oculatissimi repertoris in honorem dicavi. 
In truncis arborum, Sierra Alta de Navarro, Prov. Cartago, Cost., alt. 
. 2000", Maj. 1901, 4zastasio A/faro, n. 8063 Pl. Guat. &c., qu. ed. Donn. Sm. 
BALTIMORE, Mp. 
