FERNS OF THE MALAY-ASIATIC BEGION. 13 



4. Marsilea brachycarpa A. Br. 



Leaflets minute, incised, firm in texture; sporocarps very small, ae 

 broad as long, bordered but not ribbed, with only three sori on each side; 

 otherwise like the preceding species. 



Pegu. 



6. Marsilea brachypus A. Br. 



Leaves silky; pedicles shorter than the fruit, 2 or 3 together; sporo- 

 carps silky at maturity, ribbed. 



Neilgherries. 



M. gracilenta A. Br., from the Concan is like M. braehyims, but with less silky 

 leaves, and 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. 



6. 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, adnate to the whole base of the sporocarp; 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 31. condenrnta, but the leaves slightly larger; pedicels 6 to 

 8 cm long; sporocarps nearly square, glabreseent, 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 subtcrrestrial, 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, 1 mm long, bordered and ribbed, 

 teeth distinct, sori 4 to 6 on a side. 



India. 



4. SALVINIACEJ3. 



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. Ralrhiia 



Boots present, leaves lobed.... - 2. Azollu 



