eh 
With D. equestris I associate the following two forms as varieties, although it 
is highly probable that they are really valid species. 
var, mentiens n. var. 
_ Differs by its more remote pinnules and segments, which latter are more 
patent, broader and most of them fully entire and bluntly rounded at apex. Sori 
indusiate. Basal scales dark-brown, but scales of midribs similar to those of the 
typical form. — By its broad, mostly entire tertiary segments with rounded apex’ 
this variety resembles closely in habit D. subincisa, from which it differs distinctly 
by pubescence and venation. | 
Guatemala; Dept. Alta Verapaz, near Coban, vy. TURCKHEIM nr. Il. 2118 (W), Pansamalé, v. TURcK- 
HE ed. J. D. S. nr, 1054 (B, W — distributed as Nephrodium catocarpum Hook?) 
var. heterolepis n. var. 
Syn. Aspidium effusum var. muticum Christ, Prim. Fl. Costar 3: 32. 1901. 
A very large form with pinne up to 75 cm or more long, in habit remarkable 
by its very long stalks of the pinnz and pinnules and by its very remote pinnules; 
stalks of basal pinne up to 10 cm long, those of the lower pinnule 4—5 cm long. 
‘In colour, shape of the tertiary segments and scales of the midribs beneath (Fig. 
10d) scarcely differs from typical D. equestris, but the scales of stipe, rachis and 
axils are very characteristic. They are of two kinds: 1) closely appressed, broadly 
ovate, reddish brown, at base fimbriate, smaller scales, and 2) covering them some 
fewer, lanceolate, coal-black, pale-edged, more patent scales; all are very loose and 
easily rubbed off, so that they are to be found in the axils and in the furrow of 
the rachis. Basal scales simular to those of D. ampla. Sori exindusiate. — Probably 
a valid species. 
Panama: Vicinity of El Boquete, Chiriqui, Maxon nr. 4951 (CC, W, type). 5011 (W?, see below). 
Costa Rica; Cabeciras del Bkis, Pirrier nr. 10597 (W =v. muticum Christ). 
Maxon nr. 5011 is probably the same, haying the same scales as nr. 4951, 
but it is unique within the whole group by having the acroscopic pinnule of the 
basal pinne nearly.as much developed as the basiscopic ones; thus the basal pinne are 
therefore, nearly equally and very broadly deltoid, the second pair of pinne is 
similar in a but the peer ones are just like those of nr. 4951. 
316. Dryopteris palatangana (Hook.) C. Chr. coi: nov. 
Syn. Nephrodium (Lastrea) Palatanganum Hook. sp. 4: 260 in nota. 1862. 
Type from Ecuador: Pallatanga, leg. Spruce nr. 5256 (Kew!); only spe- 
cimen seen. 
: Although I ecw this fern only fea the original specimen that consists of 
_ two pairs of pinne and the base of a stipe, I do not hesitate to place it here 
‘as a valid — It is certainly omens related to D. ampla, with which BakER 
