454 FLORA OF MADRAS. [Myriophyllum. 



pedicelled or sessile, ? sessile. Calyx in $ minute, 4- rarely 

 2-lobed, sometimes ; in $ adiiate to the ovary, 4-furrowed, lobes 

 or 4 minute. Petals in 2 or 4, concave, sessile ; in ? usually 

 0. Stamens 2, 4 or 8. Ovary of 4, rarely 2, carpels; ovules 

 solitary, pendulous; styles short, plumose. Fruit 4-furrowed, 

 separating into 4 or 2 cocci ; embryo straight or curved. 



Floral leaves short, up to '5 in. long, submerged leaves long and much 

 pectinate ; fruit carpels spreading stellately, tubercled ; stamens 8 



1. indicum, 



Floral leaves long, up to 1 in. long or longer, submerged leaves short, 

 often absent ; fruit carpels erect, columnar, muricate ; stamens 4 



2. intermedium. 



1. MYEIOPHYLLUM INDICUM, Willd. ; F. B. I. ii. 433 ; W. & A. 

 339. 



E. Coast, from Ganjam southwards, in ponds and canals ; 

 W. Coast, more scarce. 



A floating aquatic, with very long steins and many 

 submerged leaves. 



2. MYRIOPHYLLTJM INTERMEDIUM, DC.; F. B. I. ii. 433. M, 

 indicum, Wt. 111. t. 102 except the fruit. Haloragis oligantha, 

 W. & A. 338 ; Wt. Ic. t. 1,061. 



W. G-hats, especially Nilgiris, in wet places and ponds, 

 above 5,000 ft. 



Sometimes floating, with short submerged leaves, more 

 often rooted in mud with only the upper leaves apparent. 



3. Callitriche, Linn. 



Small glabrous aquatic annual herbs. Li.aves opposite, linear 

 or obovate-spathulate, entire, the upper ones often rosulate. 

 Flowers minute, axillary, usually monoecious, solitary or some- 

 times one (J and one $ together ; bracteoles white, membranous., 

 caducous. Calyx and petals 0. Stamen 1, forming $ flower. 

 Ovary in $ flower 4-celled with 4 pendulous ovules ; styles 2, long, 

 subulate. Fruit indehiscent, of 4 carpels combined in 2 pairs, at 

 length separating. Seeds pendulous; testa membranous; albumen 

 fleshy ; cotyledons short ; radicle superior. 



CALLITRICHE STAGNALIS, Scop. ; F. B. I. ii. 434. C. Wightiana, 



Wall.; W. & A. 339; Wt. Ic. t. 1,947. 



