218 166: 
distinct species there remains a good number of forms, which I refer to a single 
species, D.reptans. Although very different in habit and size they show some common 
characters: 1) the long radicant apex of some leaves, 2) the pubescence of the surfaces, 
especially the upper one, by forked hairs, 3) the glabrous sporangia; the head of 
the sporangia appears always to be glabrous, but the pedicel often bears a single 
hair; the receptacle is as a rule setose by long hairs, which often are longer than 
the sporangia, 4) the presence of a small indusium consisting af a few cells bearing 
long simple or forked hairs. — In developed fronds the lower pair of veins, which 
spring out from the secondary vein 1—2 mm above its base, are goniopteroid and 
send a branch to the sinus; in young leaves the veins are sometimes all free. The 
rhizome is erect, clothed at the top with proportionally few glossy, brown, stellato- 
pubescent scales.  Stipites fasciculated, slender, stramineous. Lamina generally 
herbaceous but frequently chartaceous or even coriaceous, more or less hairy on 
rachis and ribs by long, simple hairs. Most pinnz short-stalked, the lower ones 
not or slightly reduced, the margins cut into shallow rounded lobes or subentire. 
Veins 2—5 to a side, not very prominent beneath. Sori below the middle of the 
vein. As to size and shape of leaves and pinnze nothing can be said, which agrees 
even with two specimens from the same locality. It seems that leaves from same 
rhizome but of different age vary very much. 
Maxon has recently tried to show that the right name of this species is D. 
radicans (L). It is illustrated by SroAwE pl. 29 and 30 fig. 1 and by PLUKENET 
pl. 253 fig. 4, which plates were cited by Linnaus under his first description of 
Asplenium radicans (Syst. Nat. ed. X. 2: 1323. 1759), as well as by Swarrz under his 
P. replans. If Linnaxus really founded his Asplenium radicans (— Aspl. radicans of 
my Index) on SroawE's plate, Maxon is certainly right in changing the name, but 
we have here a case, which exactly corresponds with that af Asplenium erosum L., 
which name Maxon uses for the well-known A. auritum Sw. This later case I 
have dealt with in some detail in my paper on SwanRTZ's species of ferns (Arkiv 
for Bot. 9%: 14—17). It is right that Lrynaus under the first description of his 
Aspl. radicans quoted the said plates only; but in Spec. plant. ed. II. 1540. 1763, 
where the name is changed to Aspl. rhizophyllum, he immediately after the 
description cites “Brown. Jam. 92". This additional citation is important, because 
it proves that Linnamus founded his species on dried specimens, not on SroANE's 
plates. Liynzus bought namely, in the year 1758 a collection of Jamaican plants 
gathered by P. Browne, and described in BRowNE's work on Jamaica. This work 
from 1758 Liww;zUs did not know during the preparation of the tenth edition of 
Systema Nature and therefore it could not, of course, be cited in this edition. It is 
natural that LixN;EUS tried to determine BnowNE's specimens by aid of SLOANE’s 
and PLUKENET’s works, and when finding a plate, which he believed to illustrate 
the species, he quoted that plate. Knowing BnowNE's work while preparing the 
second edition of Species plantarum he then always cited this work before the 
citalions given in 1759 and always immediately after the description, which proves 
