CALLITRICH ACE^. 121 



little shorter than broad, subcordate, flattish on the faces ; marginal 

 furrows shallow, increasing in depth regularly from the keels of the 

 lobes to the line of separation between them ; margins of the lobes with 

 short wide keels, the section of which is nearly a right angle. Styles 

 very long, at length rcflexed and adpressed, deciduous. 



In ditches, ponds, and lakes, more rarely on mud. Not uncommon, 

 and generally distributed. 



England, Scotland, Ireland. Perennial. Summer, Autumn. 



A very variable plant, sometimes with the upper leaves obovate or 

 oblanceolate, at other times with them all linear and submerged. 

 Bracts much incurved, very deciduous. Fruit about gV inch long, 

 olive. 



Professor Babington suggests that the bracts are perhaps confined 

 to the male flowers, but they are so very deciduous that, unless 

 observed when the flowers are very young, the plant appears to have 

 no bracts at all. 



When submerged the plant is more olive in colour than the pre- 

 ceding, and the leaves more translucent; it never has, however, the 

 deep green leaves of C. autumnalis, and the fruit is very diff^erent. 



I have not seen this subspecies growing out of the water, but Dr. 

 Hegelmaier infers that this sometimes takes place, as he states that 

 " land forms are not abundant." 



Hooked Water Starwort. 

 French, CalUtrique en crochet German, Hahenformiger Wassersteni. 



Sub-Species (?) IV.— CaUitriche pedunculata. d.G. 



Plate MCCLXXIV. 

 Hegclni. Monogr. p. 57. 



C. liamulata, /3, Bab. Man. Brit. Bot. ed. vi. p. 304. 

 C. autumnalis, HooJc. in E.B.8. No. 260G (non Linn.). 



Pollen grains subglobose. Fruit subsessile or more or less con- 

 spicuously stalked, as long as or a little shorter than broad, subcordate, 

 flattish on the faces; marginal furrows shallow, nearly as deep close 

 to the keels of the lobes as in the line of separation between them; 

 margins of the lobes with short slender keels, the section of which 

 is an acute angle. Styles rather long, at length reflexed and spread- 

 ing, caducous. 



In ponds and ditches, but much more frequently on mud or in damp 

 places. Common, and generally distributed. 



England, Scotland, Ireland. Perennial. Spring, Autumn. 



C. pedunculata is probably only a variety of C. hamulat;i, growing 



VOL. VIII. R 



