432 LVI. HALORAGE.E. (C. B. Clarke.) \_Serpicula. 



S. veronic&folia, Bory of Java; Tulasne in Ann. Sc. Nat. ser. 4. vi. 126, slightly 

 differs from the most glabrous Indian specimens (8. brevipes W. ^ A.) by being quite 

 glabrous, more robust in habit, a brighter red colour, and the fruit more tuberculate. 



SEHPICULA VEETICIIXATA, Roxb. Cor. PL t. 164 and Fl. Ind. iii. 578 is Hydrilla 

 verticillata Richard among the Vallisn&riece. 



3. HIPPURIS, Linn. 



A glabrous water plant, the stems thick, simple, leafy. Leaves in whorls of 

 4-6-12, linear or oblong. Flowers minute, solitary, sessile in the axils of the 

 leaves ; hermaphrodite or unisexual. Ca/?/.r-tube subcylindric, limb entire. Pe~ 

 tals 0. Stamen 1, epigynous. Ovary inferior, 1-celled ; style 1, linear, stigmatose 

 along nearly its whole length ; ovule 1, pendulous. Drupe ellipsoid, very smooth, 

 indehiscent, with a thick wall. 



1. K. vulgraris, Linn. Sp. PJ.p. 6; DC. Prodr. iii. 71 j Engl.Bot.t. 

 763 ; Boiss. Fl. Orient, ii. 754. 



WEST TIBET, alt. 10,000-1 5,000 ft.; Falconer, T. Thomson, Strachey $ Winter- 

 bottom. DISTEIB. Cabul ; Dahuria ; and in the frigid or cool temperate waters of 

 the whole Northern Hemisphere ; also at Magellan Straits. 



Leaves in the Tibet specimens about 1 in. 6-10 in the whorl. Flowers in the 

 upper part of the stem that emerges from the water ; lowest part of the stem losing 

 its leaves. In all respects agreeing with the common European type. 



4. IKYRXOPHYXiXiUBX, Linn. 



Serbs, glabrous, their stems floating. Leaves dentate-serrate or pectinate- 

 pinnatifid, rarely entire, whorled in the Indian species except M. intermedium. 

 Flowers small, sessile or nearly so, in the axils of floral leaves or in 

 nearly naked spikes ; monoecious or hermaphrodite. MALE : calyx-tube short, 

 limb 2-4-fid or ; petals 2-4 ; stamens 2-8. FEMALE : calyx-tube deeply 4- 

 furrowed, limb or of 4 minute lobes ; petals minute or j ovary inferior, 4- or 

 2-celled ; styles 2 or 4, short, usually recurved with plumose stigmas ; ovules 

 solitary in each cell, pendulous. Fruit 4-furrowed or separating into 4 or 2 

 carpels. DISTBJB. Species 15, found all over the world. 



Wight's Herb. No. 942 named M. indicum Willd. consisted really of M. interme- 

 dium DO. and M. tuberculatum Roxb. mixed together. The single plate we have 

 illustrating Indian Myriophyllum viz. Wight 111. t. 102 is made up of a stem of M. in- 

 termedium together with an analysis of the fruit (very good) of M. tuberculatum. 



Further, the plate of Haloragis oligantha Wight Ic. t. 1061 is M. intermedium DC. y 

 as are Wight's own herbarium specimens of bis Haloragis oligantha ; but not so 

 Arnott's, as see under Serpicula zeylanica above. 



Lastly, though Wight's Herb. 942 was named M. indicum, Willd., Wight's own 

 Herb. No. 1094 is truly M. indicum as Arnott quotes it to be in W. $ A. Prodr. 339. 



1. M. tuberculatum, Roxb. Hort. Seng. 12 ; Fl. Ind. i. 451 ; spikes 

 in fruit subtenninal, floral leaves -f in. linear cuneate toothed upwards, 

 fruit in. long, a broad furrow between the acute carpel-backs, both the ridges 

 and the broad furrows carrying pointed small tubercles. Wall. Cat. 6337 ; DC. 

 Prodr. iii. 69 ; Miq. Fl.'Ind. Bat. i. pt. i. 635. M. intermedium, Wight HI t. 

 102 as to the fruit only. M. indicum, Griff. Not. iv. 687. 



ASSAM and EAST BENGAL. Very common in the j heels, but no specimen from west 

 of Calcutta. 



Upper whorls usually of male flowers, lower of female ; hermaphrodite flowers 



