HYPARRHENIA 



337 



Hymenocnemis Hook. f. Rubiaceae (n. 5). i Madag. 



Hymenocrater Fisch. et Mey. Labiatae (vi). 9 W. As. 



Hymenodictyon Wall. Rubiaceae (i. 5). 8 trop. Afr. and As. 



Hymenolaena DC. = Pleurospermum Hoffm. p.p. (Umbell.). 



Hymenolepis Cass. = Athanasia L. p.p. (Comp.). 



Hymenolepis Kaulf. Polypodiaceae. 4 Indomal., Madag. 



Hymenolobium Benth. Leguminosae (in. 8). i N. Brazil, Vene- 

 zuela. 



Hymenolophus Boerl. Apocynaceae (i. 3). i Sumatra. 



Hymenonema Cass. Compositae (13). 2 Greece. 



Hymenopappus L'Herit. Compositae (6). u N. Am. 



Hymenophyllaceae. Filicales Leptosporangiatae. 2 gen., 400 sp. trop. 

 and temp, (filmy ferns), chiefly in damp woods. Stem very slender, 

 often creeping; sometimes it bears roots, in other cases only root 

 hairs. It grows more rapidly than the L, so that its leafless tip appears 

 naked like a root. L. pinnate, filmy in texture (only one cell thick, 

 except at the veins), with no stomata. The placenta is at the leaf-edge, 

 a continuation of the vein ; it bears sporangia and is surrounded by a 

 cup-shaped indusium. Sporangia sessile, with oblique or transv. 

 complete annulus, opening by a longitudinal fissure. The prothalli 

 are capable of long life ; in some they produce gemmae or buds on 

 the margin, and may thus multiply veg. to a considerable extent. 

 Chief genera: Hymenophyllum (indusium 2-valved), Trichomanes 

 (indusium tubular or cup-like). 



Hymenophyllum L. Hymenophyllaceae. 250 cosmop. 2 in Brit. 

 (filmy ferns), H. tunbridgense Sm. and H. peltatum Desv. 



Hymenophysa C. A. Mey. Cruciferae (inc. sed.). 2 Cent. As. 



Hymenopogon Wall. Rubiaceae (i. 5). 2 Himal., Assam. 



Hymenoptera, the bees, wasps, &c.; cf. Bee-flowers. 



Hymenopyramis Wall. Verbenaceae (5). i India, Burma. 



Hymenorchis Schlechter. Orchidaceae (11. 20). 7 N. Guinea, Java. 



Hymenosicyos Chiov. Cucurbitaceae (2). i E. Afr. 



Hymenosporum R. Br. ex F. Muell. Pittosporaceae. i E. Austr. 



Hymenostegia Harms. (Cynometra p.p.). Leguminosae (n. 2). 3 

 trop. Afr. 



Hymenostephium Benth. Compositae (5). 2 Mexico, Colombia. 



Hymenothrix A. Gray (Hymenopapptis p.p. EP.}. Compos. (6). 2 

 Mex., Texas. 



Hymenoxys Cass. (Actinella Nutt. p.p. EP.). Compositae (6). 17 

 Am. 



Hyobanche L. Scrophulariaceae (in. 2). 2 S. Afr. 



Hyophorbe Gaertn. Palmae (iv. i). 3 Mascarenes. 



Hyoscyamus (Tourn.) L. Solanaceae (2). n N. Afr., Eur., As. 

 H. niger L. (henbane) in Brit., probably an escape, it having formerly 

 been largely cult, as a narcotic. The fls. are in cincinni. The 

 capsule stands erect enclosed in the calyx, and opens by a lid (censer- 

 mechanism). 



Hyoseris L. Compositae (13). 3 Medit. 



Hyospathe Mart. Palmaceae (iv. i). 4 trop. S. Am. 



Hypargyrium Fourr. = Potentilla L. (Ros.). 



Hyparrhenia Anderss. = Andropogon L. p.p. (Gram.). 



W. 



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