420 
HAMAMELIDEAE 
Hamamelideae (Benth.-Hooker) = Hamamelidaceae. 
Hamamelis Gronov. ex Linn. Hamamelidaceae. 3 sp., two in China 
and Japan, the other, H. virginiana L., the witch-hazel, in east N. 
Am. This sp. is common in gardens. It flowers in late autumn and 
ripens its fruit (which is said to be explosive) in the following year. 
Hamelia Jacq. Rubiaceae (1. B, 8). 6 sp. Am. 
Hamlltonia Roxb. Rubiaceae (11. B, 16). 4 sp. Indo-mal., China. 
Hanburia Seem. Cucurbitaceae (iv). 1 sp. Mexico. Fruit explosive. 
Hancomia Gomez. Apocunaceae (1. 1). 1 sp. Brazil, H. speciosa 
Gomez, the source of Mangabeira rubber ( New Bull . 1899, p. 
185)- 
Haplopappus Endl. = Aplopappus Cass. 
Hardenbergia Benth. Leguminosae (in. 10). 3 sp. Austr. Included 
in Kennedya in Nat . PJl . 
Hardwickia Roxb. Leguminosae (11. 2). 5 sp. trop. As. and Afr. 
Harpagophytum DC. Pedaliaceae. 3 sp. S. Afr. H. procumbens DC. 
is the grapple-plant; its fruit is beset with large woody grapples 
about an inch long, pointed and barbed. It is thus well adapted to 
animal distribution, and is troublesome to wool growers (cf. Xan- 
thium). 
Harpephyllum Bernh. ex Krauss. Anacardiaceae (11). i sp. S. Afr. 
Harpullia Roxb. Sapindaceae (11). 25 sp. palaeotrop. 
Hartwegia Lindl. Orchidaceae (13). 2 sp. Centr. Am. 
Harveya Hook. Scrophulariaceae (ill. n). 14 sp. S. Afr. Some are 
root parasites, like Euphrasia. 
Hauya (Moc. et Sesse) ex DC. Onagraceae (ill). 4 sp. Mexico, Calif. 
Haworthia Duval. Liliaceae (ill). 100 sp. S. Afr. Xerophytes with 
fleshy leaves, similar in habit to Crassulaceae. 
Haylockia Herb. Amaryllidaceae (1). 1 sp. S. Am. Plants like 
Crocus, with the firs, projecting from the soil. 
Hebenstretia Linn. Scrophulariaceae (11. 9). 20 sp. S. Afr. The 
corolla is slit open along the anterior side, and the style and sta. 
project through the slit. [Selagineae Benth.-Hooker.] 
Hechtia Klotzsch. Bromeliaceae. 3 sp. Mexico. 
Hedeoma Pers. Labiatae (vi. 11). 12 sp. Am. 
Hedera Tourn. ex Linn. 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 Schrab. (n 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 
