337 



described in C. gracilis (with respect to their structure) ; the 

 point of insertion is surrounded by a whorl of 5 hracteas ? 

 two of which are placed beneath the anther. 



4. Callitriche verna. — This is sometimes found without 

 floating leaves, in which state it may have been mistaken for 



C. autumnalis. In C. verna the lower leaves are linear, 

 abrupt, or erose, single-ribbed. Fruit eniarginate, nearly 

 round and compressed, consisting of 4 semicircular flat seeds. 



5. Callitriche autumnalis. — Llyn Macloy, Anglesea, July, 

 1825 and 1828. — Flowers separated, two barren and two 

 fertile ones neighbours, but not always so. I cannot find 

 any petals. Styles very long, deflexed. Leaves not quite 

 linear, but rather broader at the base, also abrupt and single- 

 ribbed ; they are always broader than in C. verna. Fruit orbi- 

 cular, compressed, with a membranous margin. It is twice 

 the size of that of C. verna ; the seeds are thinner and more 

 closely applied to each other. I believe that petals are never 

 present in this species. I have never seen this plant growing 

 near the surface of the water. 



6. Circaea alpina. — Perthshire, July, 1827. — The Calyx is 

 certainly elevated above the germen, but is not tubular. I 

 think the part mistaken for a tubular portion of the calyx 

 is only a sort of beak to the fruit, and in that case the calyx 

 must be two-leaved. Filaments not very evidently thickened 

 upwards. Style reddish, but not the petals or filaments. 

 Stigma a double globe. 



7. Utricularia vulgaris. — July, 1828. — The bladders upon 

 the leaves have an orifice closed by an elastic valve, opening 

 inwards, and of much thinner texture than the bladder to 

 which it is attached where the crest is placed. The crest 

 usually consists of two short branched filaments ; the valve 

 is sometimes bearded ; insects often enter the bladders, and 

 are of course confined there. Anthers of one cell ; filaments 

 much bent, thick, and somewhat compressed. Stigma two- 

 lipped, the largest membranous and fringed (placed nearest 

 to the anthers.) Lower calyx-\ei\^ notched, and rather larger 

 than the other. 



