345 



MONOCOTYLEDONES. 



XCVI. HYDEOCHAEroE^. 



Sepals 3, herbaceous. Petals 3, regular, coloured. Ovary Inferior. Seeds raauy. Styles 

 3-6. Eruit not burstina;. Albumen 0. Flowers dioecious. 



740. STRATIOTES. 



1. aloides. L. ensiformi-triangular, acu- 

 leato-ciliate. p. 7j 8. Stagnant water. Bord. 

 Belg. n. and e. G. e. Eng. 



741. HYDROCHAEIS. 



1. Morsus-Ranse. L. floating, reniform. 

 p. 7, 8. Stagnant, 



743. UDORA. 



1. occidentalis. L. lanceolato-Unear, 

 straight, serrulate, with a fine mucro. p. 9. 

 Damscben See near Stettin, Pom. Leicester- 

 shire. 



743. VALLISNERIA. 



1. spiralis. All L. radical, grass-like. 

 Rhone near Aries. 

 Guaxda and Lucarno 



Canal of Lang. Lakes of 



XCVII. ALISMACE^. 



Sepals 3, herbaceous. Petals 3, regular. Ovaries 3-6, superior, each terminating in a 

 Style, and with 1 or 2 seeds. Enut not bm'sting. 



744. ALISMA. 



1. Flantago. L. ovate, acute. Caps, ob- 

 tuse, disposed in an obtuse triangle round a 

 centre, p, 7, 8. Water. 



j8. lanceolatum. L. lanceolate. 

 •y. graminifolium. Nearly all L. linear, 

 floating. 



2. ranuuculoides. L. hneari-lanceolate. 

 Caps, numerous, angular, acute, in a globular 

 head. p. 8. Wet. occ. 



p. rejiens. Caps, compressed. 



3. natans. L. ovate or oblong. Root-L. 

 linear, sessile. Caps. 6-13, striate, rostrate. 

 p. 6-8. Still water. "Wales. Cumberland. 

 m. and w. Ei*. n. and w. G. Smith considers 

 the root-L. as mere L.-stalks. 



4. pamassifolium. L. exactly cordate, 

 9-nerved. Caps, terminated by the long per- 

 manent style, p. 6, 7. Still water. Dau. 

 Berlin. Mecklenbm'g. Boh. Pdm. 



5. Damasoniuta. L. cordato-oblong. 



Caps. 6, 3-edged, subidate, acuminate, dis- 

 posed in a star. p. 5, 6. Fools, occ. Not 

 in Ger. 



745.-SAGITTARIA. 



1. sagittifolia. L. deeply sagittate : lobes 

 lanceolate, straight. Scape simple. El. in 

 whorls, p. 6, 7. Stagnant, m. Eur. 



746. BUTOMUS. 



1. umbellatus. Scape supporting a brac- 

 teate Umbel of many purplish flowers, p. 

 6-8. Still water. 



747. SCHEUCHZERIA. 



1. palustris. L. semicyhndrical, obtuse, 

 with a minute pore on the upper side at the 

 tip. p. 5, 6. Bogs. Yorksh. Vosges. G. 



748. TRIGLOCHIN. 

 1. palustre. Caps, nearly linear, of 3 



2 Y 



