312 
THE FERNS OF SOUTH AFRICA 
Natal. — Common on the coast, and frequent thence to the Drakens- 
berg (Buchanan); Krantzkloof, 1500 ft, 1893 (R. Schl. 3194); 
Buccleuch (W. Leighton); Shafton (Mrs H. Hutton, 81); Windy- 
hills, Clan, Zwaartkop, Hilton Road, Edendale, etc. (T. R. Sim). 
Transvaal. — Pilgrim’s Rest (W. Roe; Bolus, 1732); Shilouvane (Junod, 
516); not common, kloofs of Mountains (Burtt-Davy, 206); Rus- 
tenburg(R. Leendertz, 3516); Belfast and Heidelberg (R. Leendertz, 
2778 and 2555); Groenfontein, Waterberg (H. A. Baily, 356); 
Tzaneen, 2600 ft (Pole-E vans, 643); Woodbush (W. Nelson, 467); 
Rosehaugh (J. M. Sim); Haenertsberg (Mrs Pott, 4623). 
Rhodesia. — Mazoe (H. M. Hole); Umtali (J. F. Darling; Mrs Ben- 
nett); Mr Edmond's farm near Salisbury (Holland); Matopo Hills 
(Eyles; Miss Gibbs; Marloth; Rev. F. A. Rogers); Chirinda, 3700 ft 
(Swyn. 828); Chipetzana source, 4000 ft (Swyn.). 
ORDER II. S ALVIN I ACE AE. 
(. Included in Rhizocarpeae in our first edition.) 
Genus 53. Azolla Lam. 
A curious genus of minute plants, floating on water, and 
having short pinnately branched stems, from the under side 
of which the roots depend into the water. The branches 
are set with short clasping leaves, somewhat distant below, 
abundant and closely overlapping toward the points of the 
branches. In the axils of the leaves are produced the two 
kinds of sporangia, both sessile ; the larger kind roundish, 
and containing several or many globular stalked capsules, 
each containing a few microspores, the smaller roundish, with 
a conical point, and containing a single reproductive macro- 
spore. There are five species widely distributed, two of which 
are recorded from Africa. 
192. Azolla pinnata R. Br. 
Plate 172. Fig. 1. a Plant, nat. size, b Point of branch, enlarged. 
c Sporangium of macrospore, enlarged, d Sporangium of micro- 
spores, enlarged. 
Plant brownish, one-half to one inch long and broad, 
formed of one or few fronds, each about a half inch long 
and a half inch broad at the base, and having three to five 
pairs of alternate branches, of which the lower are longest 
