24 Maxon: Notes on NortH AMERICAN PHANEROPHLEBIA 
Lamina 15-30 cm. long; pi t pp 
base, the auricles usually overlapping the rachis, 
the margins elsewhere serrate or often deeply 
incised. 
Lamina 40-90 cm. long; pinnae not auriculate. 
Pinnae 12-15 cm. long, mostly falcate; veins 
I.5-3 mm. apart at the base, the veinlets very 
- 
P. auriculata. 
’ 3 5 & of een a ’ 
nearly all the outer veinlets prolonged into 
slender awnlike antrorse teeth. 4. P. nobilis. 
Pinnae 18-25 cm. long, usually very much 
broader (3-4 cm.); veins 4-6 mm. apart at the 
base, branched at a much wider angle; sori 
very large; margins heavily cartilaginous, the 
marginal teeth stout and short, one to each 
group of veinlets. 7. P. macrosora. 
I, PHANEROPHLEBIA JUGLANDIFOLIA (H. & Bj. Sm. 
In addition to Dr. Underwood’s description it may be noted 
that the rhizome is woody, relatively slender (about 1 cm. in 
diameter), 10 cm. long, or less, decumbent and without exception 
strongly curved. The small crown is densely clothed within with 
thin dark brown deltoid-oblong laxly ciliate scales, mostly with 
lighter brown margins. A few similar scales are borne at inter- 
vals along the strongly sulcate greenish or stramineous stipe. 
Both this and the next species are remarkable for the length of 
the stipe, which is usually much greater than that of the lamina. 
The characters of venation and position of sori mentioned above 
in the key appear to be constant, in the case of normally well- 
developed plants. 
As observed by the writer in Alta Verapaz, Guatemala (Maxon 
& Hay 3289), and in the mountains of Chiriqui (Maxon 4935; 
5192, 5544), at from 900 to 1,500 meters elevation, P. juglandifolia 
grows in deep shade, on very humid heavily forested slopes. 
Additional specimens, not cited by Dr. Underwood, are as follows: 
Costa Rica: Alajuelita, altitude 900 meters, John Donnell 
Smith 8074; collected by A. Alfaro, original number 103. 
GUATEMALA: San Miguel Uspantan, altitude 6,000 ft., John 
Donnell Smith 3259;* collected by Heyde and Lux. Coban, Alta 
Verapaz, altitude 1,350 meters, H. von Tiirckheim I. 1856. 
* The balance of this number in the Nation: 
motispora. 
al Herbarium (3 sheets) is P. re- 
