464 
LOTUS 
opening at the apex. The pollen is shed in the bud into the tip of 
the keel, and the filaments of five of the sta. thicken out below the 
anthers, forming together a piston, which, when the keel is depressed, 
forces the pollen out in a little stream at the apex. The style is 
immersed in the pollen, but only becomes receptive on being rubbed, 
so that the flower has a good chance of cross-fertilisation. The 
plant is useful for pasturage. [Brand in Engl . Jb . XXV. p. 166.] 
Loudonia Lindl. Haloragidaceae. 3 sp. Austr. 
Lourea Neck. Leguminosae (ill. 7). 4 sp. trop. As. and Austr. 
Loxococcus H. Wendl. et Drude. Palmae (iv. 6). 1 sp. Ceylon. 
Loxsoma Br. Ilymenophyllaceae. 1 sp. N. Z. better placed in a 
separate order; cf. G wynne- Vaughan, Ann. Bot . xiv. 1901, p. 71. 
Loxsomaceae. Cf. Filicineae, and Loxsoma. 
Lucilia Cass. Compositae (iv). 25 sp. S. Am. 
Luculia Sweet. Rubiaceae (1. 4). 2 sp. Himal., Khasias. 
Lucuma Molina (excl. Vitellaria Gaertn. f.). Sapotaceae (1). 4 sp. 
S. Am., Austr., New Caled. The fruit of L . bifera Molina is edible. 
Ludovia Brongn. Cyclanthaceae. 2 sp. S. Am. 3 flrs. as in Carludovica, 
? sunk to stigmas, with rudimentary P. Climbers. 
Ludwigia Linn. Onagraceae (1). 20 sp. N. Am. and trop. ; also one 
(Z . palustris Ell.) in Eur. (incl. Brit.). 
Luehea Willd. Tiliaceae. 15 sp. Am. 
Luffa (Tourn.) Linn. Cucurbitaceae (ill). 7 sp. trop., all but one in 
Old World. Z. cylindrica M. Roem. (Z. aegyptiaca Mill.) furnishes 
the well-known loofah or bath sponge, which consists of the vascular 
bundle net of the pericarp. The fruit of most sp. is edible. 
Luisia Gaudich. Orchidaceae (31). 10 sp. trop. As. to Japan. 
Lumnitzera Willd. Combretaceae. 2 sp. palaeotrop., in mangrove 
swamps. Fruits floated by ocean currents. 
Lunaria Toum. ex Linn. Cruciferae (11. 11). 2 sp. Eur., Z. rediviva L. 
and Z. biennis Moench (Z. annua L.) ; the latter is the honesty of 
gardens. 
Lupinus (Tourn.) Linn. Leguminosae (in. 3). 100 sp. Am., Medit. 
Floral mechanism like that of Lotus. The fruit explodes, its valves 
twisting spirally. Several sp. of lupin are cultivated for their flrs., or 
used as fodder plants. 
Luvunga Buch.-Ham. Rutaceae (x). 4 sp. Indo-mal. 
Luziola Juss. Gramineae (vi). 6 sp. Brazil to Alabama. 
Luzula DC. Juncaceae. 40 sp. temp., chiefly Old World ; 6 in Brit, 
(wood-rush). Rhizome as in Juncus ; leaves usually flat. 
Luzuriaga Ruiz et Pav. (Enargea Banks). Liliaceae (x). 3 sp. S. Am., 
N. Z., &c. 
Lycaste Lindl. Orchidaceae (18). 30 sp. trop. Am. Epiphytes. 
A chin is formed by an axial outgrowth from the column. 
Lychnis (Tourn.) Linn. (incl. Agrostemma Linn., Githago Adans., 
Melandrium Roehl., Vise aria Riv.). Caryophyllaceae (1. 1). A genus 
