32 
2. All hairs short, articulated Céenitis-hairs. 
— Besides Cienitis-hairs also other kinds. of hairs are to be found; coste and co- 
stules above strigose by antrorse, subulate often falcate hairs or long hairy by 
long pluricellular, flexible hairs. Basal posterior tertiary segment of tripinnatifid 
species generally broadly adnate to the costa of the pinna with its midvein 
running out from it. Bipinnatifid-decompound species of thick texture and 
broad ultimate segments 4. Group of D. subincisa, Sp. 318—348. 
Lamina bipinnatifid Teal D. flexuosa tripinnatifid); scales of stipe and rachis not 
hairlike or blackish (stipe and rachis not crinite), these of the coste beneath 
rarely bullate; veins reaching the margin: 
1. Group of D. submarginalis, Sp.s 284—298. 
Lamina bipinnate-decompound, rarely bipinnatifid; stipe and rachi crinite by 
blackish, hairlike, patent or retrorse scales; scales of cost and costules beneath 
most often bullate; the larger decompound species of this group have an ovate 
lamina, i. e. the basal pinne somewhat shorter than the following and their lower 
basal pinnula shorter than the folowing. hey do not reach the margin. 
2. Group of D. hirta, Sp. 299—3812. 
Lamina decompound, deltoid, i. e. the basal pinne are the longest and their lower 
basal pinnula much the longest. Very scaly, the scales thin, not clathrate, reddish, 
rarely blackish, these of the stipe beneath form a large tuft; bullate scales none. 
Basal posterior tertiary segment of an upper pinnula not broadly adnate to the 
costa of the pinna, and its midrib runs out from the base of the costule of the 
pinnula or above the base. 3. Group of D. ampla, Sp. 313—317. 
ad 
1. Group of D. submarginalis. 
With a single exception here belong species only which have a bipinnatifid 
lamina with simple veins. The species, which were described in the first part of 
this monograph, do not represent a single line of development, nor do all belong 
bipinnatifid species to this group. To the group of D. hirla I refer those Central- 
American species that have bullate scales or the stipe crinite by rigid dark brown 
‘Scales; the two species D. nigrovenia and D. Tonduzii 1 retain here, but they 
are in some characters intermediate between this group and that of D. hirta. 
Also D. vellea 1 place here, but it is not unlikely that it should be referred to 
the hirta-group because of its bullate scales and geographical distribution, being 
the only West-Indian species referred to the group of D. submarginalis. 
_ All species of this group lack shorter or larger common whitish or brownish 
subulate hairs; the cost above are always rusty pubescent by the common short 
articulated hairs peculiar to the subgenus. Some few bipinnatifid species dealt with in 
the first ms (no.s 48—53) I refer to the subincisa- -group; they have furcate veins 
