HEL I C O DICER OS 421 
wounded pigs rub themselves against the trees to heal their wounds 
with the resin. 
Hedycapnos Planch. = Dicentra Bernh. 
Hedycaria Forst. Monimiaceae. 10 sp. Austr. to Fiji. 
Hedychium Koen. Zingiberaceae. About 30 sp. chiefly trop. As. 
The rhizome is often tuberous. The flr. has a long tube, at the end 
of which spring the very narrow free parts of the petals and the 
larger staminodes and labellum. The stigma projects just beyond the 
anther. According to F. Muller and others the flr. is adapted for 
fertilisation by the wings of butterflies. 
Eedyotis Linn. Rubiaceae (1. 2). About 120 sp. trop. Incl. in 
Oldenlandia in Nat . PJi. 
Hedypnois Schreb. = Rhagadiolus Tourn. 
Hedypnois (Tourn.) Scop. =Leontodon Linn. 
Hedysarum (Tourn.) Linn. Leguminosae (ill. 7). 60 sp. N. temp. 
Heeria Schlecht. (. Heterocentron Hook, et Arn.) Melastomaceae (1). 
6 sp. Cent. Am. Some of the sta. attract insects, the others pollinate 
them (cf. Commelina). 
Helenium Linn. Compositae (vi). 30 sp. W. Am. 
Heleocharis Lestib. = Eleocharis R. Br. 
Heliamphora Benth. Sarraceniaceae. 1 sp. Guiana, a pitcher plant 
(p. 178 and cf. Sarracenia), not yet thoroughly studied. 
Helianthemum Tourn. ex Hall. Cistaceae. 120 sp. Eur., Medit., 
N. Am. H. vulgare Gaertn. and 3 others in Brit, (rock-rose). Infl. 
a cincinnus. The flr. contains no honey and is homogamous, with 
sensitive sta., which move outwards when touched. 
Helianthus Linn. Compositae (v). 55 sp. Am. Several sp. are 
widely cultivated. H . animus L. is the sunflower; the number 
of firs, upon the head is often enormous and they show very 
regular spiral arrangement, probably due (largely) to pressure in 
the bud. The ray florets are neuter. H . tuberosus L. is the 
Jerusalem artichoke. It has subterranean tuberous stems, like 
potatoes, with well marked ‘eyes’ (buds in axils of scale-leaves). 
Helichrysum Vaill. ex Linn. Compositae (iv). 300 sp. Eur., As., 
Afr., Austr. About 150 occur in S. Afr. Many are xerophytes with 
hairy surface, decurrent leaves, &c. The dried flower-heads of some 
sp. are sold as ‘ everlastings.’ 
Helicia Lour. Proteaceae (11). 25 sp. Indo-mal. &c. 
Helicodiceros Schott. Araceae (vn). 1 sp. Corsica, Sardinia, H . cri - 
nitus Schott ( H . muscivorus Engl.). The development of the pedate 
leaf is cymose ; the later formed branches grow more slowly than the 
earlier. The specific name muscivorus is due to the number of flies 
captured ; they are attracted by the foul smell of the infl. (cf. Arum) 
and collect inside the spathe in enormous numbers (in the Bot. Gdn. 
Cambridge, the whole spathe may often be seen tightly packed with 
them) ; when it withers the top closes and they are caught. 
