581 



&f)e Crca£urg of 3Sritann. 



[henr 



pairs or in whorls, and solitary or ternate 

 subsessile extra-axillary flowers. The calyx 

 consists of five acute rigid sepals. The 

 corolla is campanulate, the limb cut into 

 five acute erect lobes; and there is no 

 staminal crown. [W. C] 



HEMISTEGIA. Hemitelia. 



HEMISTEMMA. A small genus of Dilr 

 leniaccce, in which the stamens are situated 

 upon only one side of the flower. The 

 species are natives of Madagascar and the 

 northern part of Australia; they are all 

 small twiggy plants with yellow flowers, 

 and resemble the rock-roses of Europe, 

 their leaves being small, entire, and of a 

 leathery texture, smooth above, but cover- 

 ed with white woolly hairs underneath. 

 The calyx consists of five permanent 

 sepals, the corolla of five petals ; the sta- 

 mens indefinite, a portion of them being 

 sterile and resembling scales ; and the two 

 distinct ovaries are terminated by thin 

 thread-like styles. [A. S.] 



HEMITELIA. A genus of tree-ferns of 

 the polypodiaceous order and the tribe 

 Cyatlieinece. The fronds are large herbaceo- 

 coriaceous, pinnate, bipinuate, or some- 

 times decompound, the veins parallel-fork- 

 ed or pinnate from a central costa, the 

 basal ones arcuately anastomosing, form- 

 ing elongated costal areoles from the 

 outer side of which free veinlets are given 

 off. This venation, taken together with 

 the presence of a half cup-shaped involu- 

 cre investing the sorus, characterizes the 

 group, except in the case of R. speciosa, 

 in which the costal arc is only here and 

 there developed. They are South American 

 or West Indian plants. [T. M.J 



HEMITERIA. A monstrosity of elemen- 

 tary organs, or of appendages of the axis. 



HEMITRICHOUS. Half covered with 

 hairs. 



HEMITROPAL. A slight modification 

 of the anatropal ovule, in which the axis 

 of the nucleus is more curved. 



HEMLOCK. Conium maculatum. — , 

 GROUND. Taxus canadensis. — , WATER. 

 j Phellandrhan aquaticum ; alsoCicutavirosa 

 | and maculata. 



HEMLOCK SPRUCE. Abies canadensis. 



HEMP. The name of various valuable 

 fibres employed for manufacturing pur- 

 poses ; and also of the plants which produce 

 them. Common Hemp is Cannabis sativa. — , 

 AFRICA>. Sansevierazeylanica and others. 

 — , EASTARD. Datisca cannabina. — , 

 BENGAL or BOMBAY. Crotalaria juncea. 

 — , BOWSTRING. Sanseviera zfi/lanica&nd 

 others. — , BOWSTRING, of India. Calo- 

 tropis gigantea. — , BROWN. Crotalaria 

 juncea. —, BROWN INDIAN. Hibiscus 

 cannabinus. — , INDIAN. Apocynum can- 

 nabinum. — , JUBBALPORE. Crotalaria 

 tenui folia. — , MADRAS. Crotalaria juncea. 

 — , MANILLA. Musa textilis. — , SISAL. 

 Aga/ce Sisalana. —, SUNN. Crotalaria 



' juncea. — , VIRGINIAN or WATER. Ac- 

 nida cannabina. 



HEMP-WEED, CLIMBING. An Ameri- 

 can name for Mikania. 



j HEMP WORTS. Lindley's name for the 

 j Cannabinacece. 



I HEN AND CHICKEN. The name given 

 to a proliferous variety of the Daisy, Bellis 

 perennis ; also Sempervivum soboliferum. 



j HENBANE. Hyoscyamus niger. 



| HENBIT. Veronica hederifolia ; also La- 

 . mium amplexicaule. 



J HENDERSONIA. One of the most strik- j 

 ' ing genera of those Coniomycetes whose j 

 | spores spring from the walls of a perithe- j 

 I cium. The spores are always more or less 

 articulated, and afford many exquisite ob- 

 jects for the microscope. Most of the spe- 

 cies are, however, in all probability, mere 

 states of different Sphceriacei. The most 

 striking perhaps is one which occurs on 

 dead seeds, the elongated spores of which 

 have many transverse divisions, each arti- 

 culation containing a large nucleus. H. 

 polycystis, however, carries the division of 

 the spores still further, having many ver- 

 tical as well as transverse septa, and being 

 moreover elegantly coated with a thick ge- 

 latinous stratum. [M. J. B.] 



HENPREYA. A genus of Acantliacece, 

 named in honour of the late Professor 

 Henfrey. It is a climber, differing in this 

 respect from most plants of the order; 

 and is also distinguished by its anthers, 

 which have awn-like processes at the base, 

 and by the small two-lobed stigma. There 

 seems, however, little to distinguish the 

 genus from Asy stasia-. E. scandens, a na- 

 tive of Sierra Leone, is an elegant stove 

 climber. [M. T. M.] 



HENNE. Lawsonia inermis. 



HENRIQUEZIA. A genus of handsome 

 bignoniaceous trees of Brazil and Vene- 

 zuela, exceptional in having a calyx whose 

 tube is adherent to instead of free from 



j the ovary, its border four instead of five- 

 toothed ; in having five perfect stamens 

 instead of four ; and in the presence of sti- 

 pules to the leaves. They have oblong or 

 obovate entire leaves placed in whorls of 

 three to five round the stem. The handsome 



| tubular flve-lobed pink or white flowers, like 

 those of some Bignonia, are disposed in 

 dense panicles at the ends of the branches. 



i The fruits, not the least curious part of 

 the plant, are flat hard-shelled bodies of the 



I shape of a bean, two-celled, opening trans- 

 versely by two valves, each cell containing 

 four seeds. The latter germinate while 

 still in the fruit. [A. A. BJ 



| HENRYA. A genus of Acanthacece, con- 

 1 taining two species, natives of Central 

 America. They are shrubs, with hairy 

 glandulose petiolate and ovate leaves, and 

 spicate flowers in an involucre composed 

 of two bracts, but apparently monophyllous 

 from the two neighbouring margins of the 

 i bracts being united on the one side while 



