28 ARKIV FOR BOTANIK. BAND 10. w:o 3. 
Dr. SKOTTSBERG has discovered the true form of H. tor- 
tuosum Hk. & Grev. in the Falkland-Islands: West Island, 
Port Howard, nr. 86, 19. 12. 1907. The species is new to the 
islands. A large form of H. dichotomum Cav. (= H. nigri- 
cans Colla) was collected on Juan Fernandez: Masafuera; 
Quebrada de las Casas, 28. 8. 1908, and a smaller, very cris- 
ped form in Masatierra: Valle Colonial, 22. 8. 1908. 
H. dentatum Cav. was on the authority of SADEBECK 
(Natürl. Pfanzenf. 14. 112) in my Index identified with H. 
Bridgesii Hook. As shown by an authentical specimen of 
H. dentatum Cav. in Herb. Swartz in Stockholm this iden- 
tification is right. 
Serpyliopsis v. d. B. 
This genus was founded by VAN DEN BoscH! on Hyme- 
nophyllum caespitosum Gaud. with this description: »Frons 
pinnata, pinnae simplices integrae vena simplici percursae, sort 
laterales, receptaculum incrassatum teres», and the genus was 
placed in the tribe Leptocionieae, while Hooker referred the 
species to T'richomanes because its sorus being trichomanoid, 
and all later authors have followed Hooker. 
Dr. SKOTTSBERG has collected a beautiful series of spe- 
cimens from different regions. After detailed studies I have 
found, that the species is rather a Hymenophyllum than a 
Trichomanes but in some respects differing from both genera. 
In indusial characters it agrees best with Trichomanes, in 
habit and general appearance with Hymenophyllum, and it is 
interesting to note that two of the forms of the species were 
originally described as species of Hymenophyllum. I have 
arrived to the result that the species is generically different 
from the two large genera and must be referred to a separate 
genus, Serpyllopsis v. d. B. The generic. characters quoted 
above are, however, insufficient, but I find two others, which 
I am inclined to regard as of higher value, viz: 1) the inde- 
finite growth of the leaves, and 2) the pubescence of thick, 
red hairs along the rachis and midribs of pinnz beneath. 
In the figures of Hooker (sp. fil. 1: tab. 40 B) the lea- 
ves are shown definite, but this was very rarely the case in 
! Versl. Akad. Wet. Amsterdam 11: 318, 1861. 
