150 98 
161. Dryopteris euchlora (Sod.) C. Chr. Index 263. 1905. — Fig. 16 e. 
Syn. Polypodium euchlorum Sodiro, Rec. 58. 1883. Cr. vase. quit. 290. 1893. 
Type from Ecuador, Mt. Pululahua, leg. Soptro (specim. auth. in Kew!); 
also Mt. Pichincha, SrünEL nr. 751 (B). 
A very large species with a stipe 60—70 cm long and a lamina of equal 
length. Rhizome apparently creeping; stipe brownish-stramineous, glabrous and 
clothed with scattered, adpressed scales, in the upper part bearing 4—5 pairs of 
tuberculiform, very distant abortive pinne. Developed pinnz numerous, the lowest 
1—2 pairs much abbreviated (Type IV), the following alternate at distances of 
4—5 cm, the upper ones closer, fresh-green, membranous but thin, very sparsely 
strigose on the costze above, otherwise like the straw-coloured rachis quite glabrous, 
but coste beneath furnished with small, scattered, deciduous scales. Largest pinnz 
up to 20 cm long, 3—3'/: cm broad, the lower ones very contracted at base, incised 
to a wing 1—2 mm broad. Segments patent, linear, 5 mm broad the apex rounded 
or subacute and generally faintly toothed, the basal ones of lower pinnz much 
reduced, of the upper equal or the anterior one somewhat shortened. Veins 15—18 
jugate, simple, not very close. Sori medial, small, exindusiate; sporangia glabrous. 
In size, shape of segments, reduction of lamina and contracted base of lower 
pinnz allied to D. piloso-hispida but very different by thin texture, glabrous frond 
and medial sori. Together with D. Glaziovii it is intermediate between the bipin- 
nalifid species of the group of D. rudis and the bipinnate D. pteroidea. 
D. atropurpurea Hieron. (supra nr. 114) I fear should be referred to D. euchlora. 
It has fewer veins, distinctly crenate segments and atropurpureous rachis, otherwise 
it is not essentially different. 
A Central-American fern, fragments of which I have known for a long time, 
and which was collected recently by Maxon in Panama, I can now with certainty 
refer to D. euchlora as 
var. inaequans nov. var. — Fig. 16 f. 
Agrees perfectly with the type in size and texture, its practically glabrous 
frond, reduction of lamina and base of lower pinne, that are very remote, in shape 
of segments, number of veins, etc. It differs from the type by its opposite pinnz 
and the segments being often crenate (like those of D. atropurpurea) but the main 
difference is the unequal-sided pinnz, the basiscop side of which is broader than 
the acroscop one (2'» cm and 2 cm in the lower pinnae) with 15—16 veins to a 
side in a basiscop segment, 11—13 in an acroscop one. — Rhizome creeping 1'/» 
cm thick, slightly scaly at the growing apex. 
Panama, Canal Zone, humid forests, Chiriqui, 1650 to 1925 m, Maxon nr. 
5674 (W). 
Nicaragua, Omotépé Island in Lake Nicaragua, U. S. North Pacific Exploring 
Expedition 1853—56 (W). 
By its unequal-sided, very distant, opposite pinnz this variety looks very diffe- 
