54 ARIL 



Turneraceae ', -late, with an aril ; -lode, a false aril, not arising from 

 the placenta. 



Arillaria S. Kurz (Ormosia]&c\i, BH.). Legumin. (ill. i). i Burma. 



Ariocarpus Scheidvv. (Mammillaria p.p. BH.). Gact. (ill. i). 4 Mex. 



Ariopsis J. Grab. Araceae (vi). i Indomal., A. peltata J. G., a small 

 tuberous herb. The few ? fls. are at the base of the spadix, the 

 $ above. This part is full of round holes leading into pear-shaped 

 cavities surrounded each by a synandrium of 6-8 sta. The synandria 

 are fused to each other so that the surface of the spadix is continuous 

 from the opening of one fl. to that of the next. 



Arisacontis Schott. Araceae (inc. sed.). i Radack I. 



Arisaema Mart. Araceae (vn). 75 As., Abyss., N. Am. Like Arum, 

 but dicec., said to be fert. by snails. The corm is known as Indian 

 turnip. 



Arisarum (Tourn.) Targ. Tozz. Araceae (vn). 3 Medit. 



Aristate (dimin. aristulate), awned. 



Aristega Miers. Menispermaceae. i Indomal. 



Aristea Soland. ex Ait. Iridaceae (n). 30 S. and trop. Afr., Madag. 



Aristida Linn. Gramineae (8). 160 temp, and sub-trop. 



Aristobulia Mart. = Andira Lam. p.p. (Legum.). 



Aristogeitonia Prain. Euphorbiaceae (A. i. i). i W. trop. Afr. 



Aristolochia Tourn. Aristolochiaceae. 250 trop. and temp.; herbs 

 with rhiz. or twining lianes. A. Gigas Lindl. (pelican flower) and 

 others often cult. orn. fl. Many trop. sp. have a small 1. surrounding 

 the stem at the base of each ordinary 1., and looking like a stip., but 

 really the first 1. of the axillary shoot, which grows very rapidly at 

 first. In other cases this 1. remains small and its shoot does not 

 develope, so that it looks like an interpet. stip. In most several buds 

 form in each axil ; the fls. usu. come from the upper ones. 



A. Clematitis L. (birthwort) an escape in Brit. P tubular, hooded 

 at top, and enlarged below round the gynostemium ; this has 6 sessile 

 extr. anthers below and as many stigmatic lobes above (really not the 

 true stigmas, but the connectives of the anthers, \\hich have assumed 

 stigmatic functions). The young fl. stands erect and its tube contains 

 numerous hairs, jointed at the base so that they can easily be bent 

 down but not up. No honey. Small flies enter the fl. at this stage 

 and find the stigmas ripe, so that if they bear pollen from other fls. 

 fert. takes place. They are unable to escape until in a day or two 

 the pollen is shed, and the hairs wither, the fl. at the same time 

 bending down (tf. Arum). In A. Sipho L'Herit. (Dutchman's pipe) 

 the P is bent like a siphon and has a polished interior surface. 



AristolocMaceae (/>. BH.). Dicots. (Archichl. Aristolochiales). 5 gen., 

 200 sp., trop. and warm temp., except Austr. Herbs or shrubs, the 

 latter usu. twining lianes. L. alt., stalked, often cordate, usu simple, 

 exstip. Fl. $, epig., reg. or -|-. P usu. (3), petaloid; A 6 36, Iree, 

 or united with the style into a gynostemium (cf. Asclepiads, Orchids, 

 &c.). G 4 6-loc. ; ov. oo in each loc., anatr., horiz. or pend. Caps. 

 Embryo small in rich endosp. The A. are difficult to place in the 

 system. They have been put near Dioscoreaceae, though not monocot. 

 BH. place them in Multiovulatae Terrestres. Chief genera: Asarum, 

 Aristolochia. 



