1. Alisma.] 129. ALISMACE.E. 



sepals persistent. Achenes 5-8 turgid, not Avhorled, -08" long awned 

 with the style, obovoid and doisally j-ibbed. 



Marshes. Throughout the plains (^f India accordino: to the F.B.I. The nearest 

 locality to our area whence there is record of its collection is the Tarai and it will 

 lirobably be found in Purneah. 



3. A. oligococcum, F. Muell. 



Similar habit or, apparently, sometimes submerged with very 

 flaccid leaves. Leaves 3-6" by 2-3" membranous broadly ovate with 

 ■cordate base, acute lobes and narrow sinus, 1 1-17-nerved. Panicle 

 much smaller, (i-9" long and broad, at once lecognisable from the 

 large lanceolate bracts of the lower whorls which attain 2-3" long. 

 Fruiting carpels whorled, -08", ridged and muricate. 



Prom the United Provinces to Beng-Hl. probably therefore in our area. Fl. 

 Sept. 



2. LIMNOPHYTON, Miq. 



Characters of AUstna but flowers polygamous. Seed with very 

 woody endocarp and with a hole on each f^ide between the endocarp 

 and the exocarp. 



1. L. obtusifolium, Miq. 



A dwarf or robust marsh herb with manj'-nerved reniformly- 

 sagittate to tiiangular with lanceolately lobed leaves 0-12" by 4-8". 

 Petiole 1-3 ft. long. Flowers numerous, white, -S-'S" diam. in 

 whorls on the branches of a large ijanicle 2-4 ft. long (with the peduncle). 

 Upper whorls mostly male,- lower 2-sexual. Achenes in a globose 

 head -b-'lo" diam., obovoid, turgid with fleshy epicarp wrinkled 

 when dry. 



Marshy places, tanks, etc. Bengal, Gr{f}ifh (without locality) ! Chiefly in lower 

 Bengal. Eurz, etc. ! an<l as it extends to the Deccan and Saharapur probably 

 ■occurring in Orissa. Fl. Feb. Fr. March, July. 



The number of flowers or members in a whorl is very variable, only about 5 in 

 weak specimens, crowded in strong ones. Bracts scarious. Pedicels in flower 

 filiform. 



3. SAGITTARIA, L. 



Aquatic herbs, erect in shallow water or Avith submerged and 

 floating leaves in deep water, often cordate or sagittate. FloAvers 

 rather larcje, 1 -sexual or polygamous in panicled or spicate whorls. 

 Sepals 3 herbaceous. Petals 3 deciduous. Stamens () or more with 

 filiform compressed filaments. Carpels very many, laterally flattened, 

 crowded on a large globose or oblong receptacle. Style ventral or 

 apical, stigma papillose. Ovule solitary, basilar. Fruit a globose 

 or oblong head of flattened crested or winged achenes. Embryo 

 horse-shoe-shaped. 



Leaves iisually hastate or sagittate. St. about 2i in M. fl. 



Achenes with aTi entire wing 1. gagittifolia. 



Leaves broadly ovate deeply cordate. St. 6-10 in M. fl. Achenes 



with a bi'oad toothed wing all round 2. (juayanemig. 



1. S. sagittifolia, L. Arrow-head. 



An aquatic with the leaves in deep running Avater strap-shaped, 

 •when floating with lanceolate or ellii:)tic ])lades and in shallower water 



844 



