163 215 
Stipes fasciculated, up lo 25 cm long, glabrous. Lamina papyraceous, narrow- 
lanceolate, 30—40 cm long, 4—10 cm broad, pinnate about to the middle, upwards 
gradually tapering into a long pinnatifid apex. Lowest pinnz considerably short- 
ened, larger ones sessile and the upper adnate to rachis, distant, opposite, 3—5 cm 
long, 1!s em broad, obtuse, shallowly serrulate. Rachis, costee and veins beneath 
rather densely setulose by long, rigid hairs and with fewer short, stellate hairs; 
leaf-tissue of upper-surface minutely pubescent by adpressed hairs of under-surface 
glabrous, not verrucose. Veins prominent beneath, 3—4 to a side, those of the basal 
pair much upcurved and generally united before reaching sinus. Sori inframedial, 
mostly confined to the anterior basal vein. Indusium subpersistent, setose by simple 
hairs. Sporangia glabrous; receptacle setose. 
—)913. Dryopteris dissimulans Maxon et C. Chr. n. sp. 
— D.scolopendrioides (L.) O. K. >< D. sagittata (Sw.) C. Chr.? 
Type from Cuba: Arroyo de Pedro, ad Jaguey, 600 m., EaGers nr. 4958 (W !) 
Rhizomate erecto, dense radiculoso, squamis brunneis sparse stellato ciliatis 
onusto. Stipitibus fasciculatis, 3—5 cm longis, strictis, minute stellato-pulverulentis 
et sparse squamosis, Lamina ad 30cm longa, supra medium 4cm lata, versus 
apicem breviter acuminata, versus basin longe et gradatum attenuata, coriacea, 
griseo- viridi, ad medium pinnata, supra medium fere ad rachin pinnatifida. Rachi 
tereti, stellato-puberula. Pinnis liberis multijugis sensim reductis, inferioribus 2—3 
mm longis et latis, omnibus basi utrinque subauriculatis, adnatis; segmentis supra- 
medialibus ad 2'/2em longis, a basi, 6 mm lata, versus apicem acutum sensim 
attenuatis, parum obliquis, sinubus acutis separatis, supra glabris, infra prasertim 
ad costas venasque breviter stellato-puberula. Venis bi-trifurcatis, ramis versus 
marginem non raro anastomosantibus. Soris parvis, in segmento biserialibus, fere 
medialibus. Indusiis parvis, stellato-ciliatis. Sporangiis glabris. 
In general I am not inclined to consider a form intermediate between two known 
species a hybrid between them, but in this case | am not far from believing that 
the present plant is a hybrid between D. scolopendrioides and D. sagittata. In almost 
every respect it is exactly intermediate between the two species. In the presence of 
an indusium and in cutting it resembles the former species, in the shape of the 
segments and in the large number of downwards gradually dwindling pinnze, which 
show a tendence to becoming auricled on both sides at base, it is very like the 
latter. In venation it is also intermediate. Hereto comes the fact that the spo- 
rangia are partly abortive and do not produce spores, and further that EGGEns: has 
gathered both true D. sagittata (nr. 4950) and D.scolopendrioides (nr. 4887) in the 
same locality. From D. guadalupensis (Wikstr.) D. dissimulans differs by coriaceous 
texture, grey-green colour, somewhat verrucose under-surface, by the large num- 
ber of free and closely placed pinnz and by the basal veins rarely being goni- 
opteroid. 
28* 
