FERNS OF THE MALAY-ASIATIC REGION. 
13 
4. Marsilea brachycarpa A. Br. 
Leaflets minute, incised, firm in texture; sporoc-arps very small, as 
broad as long, bordered but not ribbed, with only three sori on each side ; 
otherwise like the preceding species. 
Peg'll. 
5. Marsilea brachypus A. Br. 
Leaves silky; pedicles shorter than the fruit, 2 or 3 together; sporo- 
carps silky at maturity, ribbed. 
Neilglierries. 
I/, gracilenta A. Br., from the Concan is like M. brachypus, but with less silky 
leaves, ancl without visible ribs on the sporocarps. 
All of the preceding plants except M . quadrifolia seem closely related, and are 
united under M. minuta by Baker. 
(5. Marsilea condensata Baker. 
“Subterrestrial, densely tufted; stipes 12 to 36 mm long; leaflets trian- 
gular, firm in texture, thinly silky, 6 to 8 mm long, crenate on the outer 
edge ; pedicels in a tuft with the leaves, free to the base, 3 to 6 mm long, 
stiffly erect, actuate to the whole base of the sporoc-arp ; sporocarp horizon- 
tal, suborbicular, densely silky, 3 mm long; basal teeth none or very 
obscure; sori about 10 in all.” 
India (Scinde). 
7. Marsilea quadrata A. Br. 
Similar to M. condensata, but the leaves slightly larger; pedicels 6 to 
8 cm long; sporocarps nearly square, glabrescent, 2 mm long, basal teeth 
distinct, the upper one prominent, sori 5 or 6 in all. 
Borneo. 
8. Marsilea Coromandel ica Burm. 
A small plant, aquatic or subterrestrial, glabrous throughout; stipe 
up to 7 cm long, leaflets 2 to 8 mm long, entire, with false veinlets of 
sclerenchyma showing as hyaline streaks between the real veinlets; pedi- 
cels 12 to 18 mm long, free, inserted in the middle of the case of the 
sporocarp; sporocarp oblong, erect, 4 mm long, bordered and ribbed, 
teeth distinct, sori 4 to 6 on a side. 
India. 
4. S A L VINI ACEiE. 
Small plants, floating on the water; fronds folded in the bud, simple; 
macrospores and microspores in separate sori. Two genera. 
Roots none, normal leaves not lobed 1. Salvinia 
Roots present, leaves lobed - 2. Azolla 
