1 1 2 
The Ferns of South Africa. 
sharply toothed where not fertile, and not narrower where fertile 
than above. Lower pinnae much largest, having several pinnate 
pinnae on each side, but largest on the lower side. Lower pinnules 
sometimes distinct, and again pinnatifid or lobed : others more or 
less connected along the mid-rib, so that the lower veinlets of one 
pinnule unite with those of its neighbours, forming regular areolae 
along the mid-rib. Texture herbaceous ; colour green. Involucre 
half-line broad, white and membranaceous, distinctly intra- 
marginal, not reaching the point of the pinnules. In young 
plants the anastomosing venation is quite distinct, and the frond 
is roundly, five lobed, or three partite in general outline, but old 
fertile fronds, except in form, become more like those of P. flabel- 
lata, Thbg., and the pinnules are often cut quite to the mid-rib, or 
so near that the veins do not unite. It then resembles P. flabel- 
lata closely. The division Campteria, to which this species 
belongs, is characterised by the veins uniting only along the 
mid-rib ; whereas in the division Litobrochia they unite freely 
throughout ; but this character does not hold rigidly, and it is 
evident that this species is a form of P. (Litobrochia) marginata, 
Bory, quoted by Baker (“ Syn. Fil.,” 172) as Kaffrarian, and 
P. serrulata, Pappe, is stated by Lady Barkly to be the same 
thing. 
P. Buchanani. Baker MSS.; Buchanan’s list, No. 42 ; Lady Barkly’s 
list, No. 56. 
West. — Knysna (Lady Barkly). 
East. — Tzitzi-kamma Forest (Rawson Herb.). 
Kaff. — Transkeinear Main (Mrs. Young), Evelyn Valley, Perie. 
Natal. — Intshanga, Karkloof, and Entumeni (Buchanan), Biggarsberg 
(Todd). 
57. Pteris incisa. Thunberg. 
Plate XLVII. Part of frond, natural size. 
Rhizome slender, widely creeping underground. Frond 
glabrous, glaucous, more or less deciduous, two to three pinnate, 
one to three feet long, nine to eighteen inches broad, on a naked, 
herbaceous, glaucous stipe, six to twelve inches long. Pinnae 
