

MAXON — STUDIES OF TROPICAL AMERICAN FERNS. 5 



Type in the U.S. National Herbarium, no. 826195, collected near Coban, Alia Verapaz, 

 Guatemala, altitude about 1,350 meters,. by Baron II. von Turckheim, no. II. 1645, 

 February, 1907. Other specimens as represented in the National Herbarium are: 

 Iiaron von Tiirckheim's no. II. 2031, collected between Coban and Tactic, at an eleva- 

 tion of 2,000 meters, December, 1907; and no. 1238 of Captain Smith's distribution, 

 collected near Coban by Baron von Turckheim in April, 1887, and distributed as 

 Cyathea arbor ea. No. II. 2031 seems to be from the base of a frond and has the pinnae 

 fully 2.5 cm. petiolate. 



The relationship of C. tuerckheimii is with the Costa Rican C. subaspera Christ. From 

 this it differs in its narrowly lanceolate or even linear-lanceolate approximate pinnules 

 (these never elongate-deltoid, as in C. subaspera), and in having the costa of the 

 pinnules and segments densely scaly. C. subaspera in all its forms is well marked by 

 its long-petiolate distant pinnules, which are only closely furfuraceous and never 



otherwise chaffy. 



POLYPODIACEAE. 



Tribe ACROSTICHEAE. 



Elaphoglossum catharinae Underw. sp. no v. in herb. 



Rhizome stoutish, 7 to 9 mm. in diameter, assurgent, clothed toward the summit 

 with a few small sparingly denticulate linear-lanceolate long-attenuate yellowish 

 brown scales; fronds rather numerous (10 to 14), loosely cespitose, 9 to 21 cm. long. 

 Foliar fronds considerably exceeding the sporophyls; stipe slender, 3 to 8 cm. long, 

 stramineous or somewhat greenish, reticulate, densely clothed with spreading yellow- 

 ish brown scales, these linear-subulate from a broader base, the margins closely invo- 

 lute; lamina firmly membranaceous, linear-oblong, 8 to 15 cm. long, 1 to 2 cm. broad, 

 abruptly acute at the base, the apex gradually attenuate, the surfaces and margins 

 sparsely clothed like the stipe; veins distant, simple or rarely once forked, usually in 

 the outer part, falling far short of the margin, the apices much enlarged. Sporophyls 

 7 to 12 cm. long; stipe 6 to 9 cm. long, similar to that of the foliar frond; lamina 2 to 

 3.5 cm. long, about 1 cm. broad, oblong-lanceolate, broadest above the abruptly acute 

 base, acutish at the apex, with numerous linear-lanceolate glossy reddish brown 

 minutely denticulate somewhat imbricate scales scattered over the lower surface 

 among the sporangia. 



Type in the U. S. National Herbarium, no. 50579, collected by Baron II. von Turck- 

 heim, from tree trunks at Pansamala, Alta Verapaz, Guatemala, altitude 1,200 meters, 

 in August, 1886, and distributed by Captain Smith as no. 1003. Baron von Turck- 

 heim 'a no. II. 1944, from Coban, Alta Verapaz, altitude 1,350 meters, August, 1905, is 

 the same in less mature condition, the sporophyls not well developed and the foliar 

 fronds rather young and more membranous than in the type. According to Doctor 

 Underwood's notes, specimens of this species at Kew were collected at Chilasco, 

 Guatemala, by Salvin and Godman. 

 Elaphoglossum guatemalense (Klotzsch) Moore. 



II. 1859. Coban, altitude 1,350 meters, September, 1907. Epiphytic. 



II. 1039. Coban, altitude 1,350 meters, August, 1907. Epiphytic. 



The present specimens, referred here with some doubt, have both fertile and sterile 

 fronds actually and relatively longer and narrower than in the typical form of the 

 species. The blades of the sporophyls especially are of unusual length (20 cm.) and 

 taper very gradually to an attenuate base. The stipes measure from 20 to 25 cm. in 



length . 



Specimens from Cubilquitz, altitude 350 meters, collected by Baron von Turckheim 

 (no. II. 890) and distributed by Captain Smith as no. 8635, are apparently more 

 typical of the species. 



Elaphoglossum hirtum (Sw.) C. Chr. 



II. 1863. Near Coban, altitude 1,350 meters, August, 1907. 



