ORDERS, GENERA, AND SPECIES. 203 



Order 29. Ceratophylleae. Flowers solitary, axillary^ 

 minute, pistillate and staminate separate, but on the 

 same plant ; petals ; sepals ; involucre 8-12- 

 partite ; staminate flowers with many crowded, sessile 

 anthers ; pistillate flowers with an oblong, 1 -celled 

 ovary ; leaves whorled, sessile, exstipulate, cut into 

 linear-toothed lobes ; a submerged branched, slender, 

 fragile herb, densely leafy, with tiny, greenish flowers. 



440. Cercdophyllum demersum, ; June 21 ; England 

 and Wales, E. Scotland, Ireland rare, Channel Is- 

 lands, p. 76 



Order 30. Lythraceae. Stamens as many or twice as many 

 as petals ; petals 3-6, rarely 0, crumpled in bud ; 

 sepals 3-6 ; ovary superior ; herbs with opposite or 

 whorled, entire leaves and showy, regular flowers. 



441. Lythrum salicaria, 92 ; P. W. F. iv. 157 ; July 4 ; 

 Perth southwards, Ireland, Channel Islands. p. 104 



442. Lythrum hyssopifolia, 6 ; June 26 ; very local, 

 Northampton, Cambridge, Norfolk, Herts., Cornwall ; 

 Channel Islands: p. 100 



443. Peplis portula, 98 ; July 6 ; Caithness south- 

 wards, Ireland^ Channel Islands. p. 130 



Order 31. Tamariscaceee. Stamens 4-10 ; petals 5, 

 rarely 4 ; sepals 5, rarely 4 ; a shrub with minute, 

 scale-like leaves and small, regular flowers in lateral 

 spikes. 



444. Tamarix anglica (gallica), ; July 15 ; S. and 

 E. coasts of England, Channel Islands. p. 148 



Order 32. Cucurbitaceae. Stamens 3 ; petals 5 ; 

 calyx 5-cleft ; ovary inferior ; fruit fleshy ; a climbing 

 herb with tendrilled leaves, and flowers in axillary 

 racemes. 



445. Bryonia dioica, 59 ; F. W. F. n. 149 ; May 16 ; 

 England mostly south. Channel Islands. p. 43 



