﻿Maxon: North American species of Psilogramme 81 



Costa Rica: Volcan de Pods, altitude 2,300 to 2,644 meters, 

 J. D. Smith 6930 (3 sheets) ; Tonduz 10712; Alfaro 121. Volcdn 

 de Turrialba, alt. 3,000 meters, Pittier 13256 {J. D. Smith 7488). 



2. Psilogramme congesta (Christ) Maxon. 



Gymnogramma congesta Christ, Bull. Herb. Boiss. II. 4: 1098. 



1904. 

 Type locality: Forests of La Palma, Costa Rica, altitude 1459 

 meters {Tonduz), 



Distribution: Costa Rica, at altitudes of 1,300 to 1,500 



This species has been very well described by Christ. It has 

 the short rhizome, closely fasciculate fronds, and conspicuous 

 spreading hispid covering of true P. hirta, but the rigidly erect 

 fronds and sturdy appearance of P. Warscewiczii, a species which 

 otherwise it does not closely resemble. The almost grayish, 

 strongly hispid aspect of the plant has been mentioned by Christ. 

 This feature, the close-set pinnae and pinnules of all the fronds, 

 and the peculiarly strict and narrow appearance of the segments 

 of the sterile fronds are the best distinctive marks of this excellent 



Costa Rica: Forets de La Palma, alt. 1,300 to 1,459 meters, 

 Tonduz 12575; Brade. La Hondura, near La Palma, alt. 1,500 

 meters, Jimenez 594; Werckle 16683. Without locality, Werckle 

 (ex herb. Christ). 



3. Psilogramme chiapensis Maxon, sp. no v. 



Rhizome apparently short, decumbent, freely radicose beneath 

 and at the sides, bearing at the apex numerous dark reddish 

 brown, opaque, rigidly acicular, simple hairs, these 1.2 to 1.8 mm. 

 long, consisting of 10 to 16 cells above the enlarged multicellular 

 base; fronds about 6, fasciculate, 40 to 57 cm. long, erect-arching; 

 stipe 20 to 25 cm. long, 1.3 to 2 mm. in diameter, dark brown from 

 a purplish brown base, lustrous beneath a sparse subpersistent 

 covering of lax multicellular simple brownish hairs; lamina linear- 

 oblong or linear-deltoid to lanceolate, acuminate, 22 to 34 cm. 

 long, 8 to II cm. broad, bipinnate-tripinnatisect, the primary 

 rachis similar to the stipe, lightly angled, subfiexuous in the apical 

 half; larger primary pinnae about 10 pairs, slightly ascending, the 

 lowermost 2 to 4 pairs opposite or nearly so, these the largest, 

 5 to 8 cm. long, 2 to 3.5 cm. broad, inequilateral, narrowly deltoid 



