408 
HEBENSTRETIA 
corolla is slit open along the anterior side, and the style and sta. 
project through the slit. [Selagineae Benth. -Hooker.] 
Hedeoma Pers. Labiatae (vi. n). 12 sp. Am. 
Hedera Toum. Araliaceae. 3 sp. temp. Old World. H. Helix L. 
is the ivy. It is a root climber on trees and rocks. The leaves are 
dimorphic, those on the climbing shoots being lobed, whilst those on 
the freely projecting shoots that bear the infl. are not. The former 
form leaf-mosaics better (see pp. 46 and 173). The firs, are not very 
conspicuous, but coming out late in the year are largely visited for 
the freely exposed honey by flies and wasps. 
Hedraeanthus Griseb. = Wahlenbergia Schrad. (11 sp. S.E. Eur., 
W. As.) 
Hedwigia Sw. Burseraceae. 3 sp. trop. Am. H. balsamifera Sw. 
(Antilles) is known as pig’s balsam, on account of a legend that 
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. 
Hedyotis Linn. Rubiaceae (1. 2). About 120 sp. trop. Inch in 
Oldenlandia in Nat. PJl . 
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. annuns L. is the sunflower; the number of firs, upon 
the head is often enormous and they show very regular spiral arrange- 
ment, probably due (largely) to pressure in the bud. The ray florets 
are neuter. H. tuber osus L. is the Jerusalem artichoke. It has sub- 
