1628 



HYMENOPHYLLUM 



HYOSCYAMUS 



HYMENOPHYLLUM (Greek, membrane-kaf). Hij- 

 mcnophyUacae. Like all members of the family, the 

 species are small and with Ivs. of very deUcate texture; 

 the sporangia are borne in marginal sori protected by 

 2-lipped cup-like indusium; otherwise the species are 

 like those of Trichomanes, the other large genus of the 

 family. — A genus of about 240 species, nearly all of 

 which are tropical. Culture p. 1214. 



A. Lvs. glabrous; rachis slightly ivinged above. 



polyanthos, Swartz. Lvs. 2-8 in. long, 1-3 in. wide, 

 tripinnatifid ; sori 2-12 to a pinna: involucre small. 

 Tropics of both hemispheres. 



demissum, Swartz. Lvs. 4-12 in. long, 3-4 in. wide, 

 3-4-pinnatifid ; sori very numerous, 20-30 to a pinna: 

 involucre with ovate entire valves. E. Indies to New 

 Zeal. 



AA. Li's. pubescent or ciliale. 



ciliatum, Swartz. Fig. 1938. Lf.-stalks ciliated and 

 winged above; If .-blades 2-6 in. long, 1-2 in. wide, 

 tripinnatifid, the segms. cihated: involucre roundi.sh, 

 the valves divided half way down and ciliated. Tropics 

 of both hemispheres. 



aeruginosum, Carm. Fig. 1939. Lf.-stalks tomentose; 

 If.-blades 2-3 in. long, 1 in. or less wide, tripinnatifid, 

 the pinnse often imbricate, the 

 surface and margins densely 

 pubescent: involucres small with 

 valves divided nearly to the 

 base, densely ciliate. Tristan 

 d'Acunha. 



1938 Hymenophyllum ciliatum. 



(X}2) 



1939. Hymenophyllum 

 seruginosum. (Nat. size) 



H, dicrandtrichum, Sadeb. (H. chiloense, Hook.). A S. Ameri- 

 can species with triangular lvs. 2-4 in. long, 1 in. broad, bipinna- 

 tifid with rounded segmg.; the margins and under surfaces hairy. 

 Gn. 74, p. 228. — H. fucoides, Swartz. A common Trop. American 

 species with oblong lvs., 6-10 in. long, l!2-2 in. broa^i, tripinna- 

 tifid, the rachis and mid-veins of the pinnie winged, the ultimate 

 Begms. Unear, spinulose. Gn. 74, p. 228. ^ j^ UndERWOOD. 



R. C. BENEDICT.f 



HYMENOSPORUM (Greek, membrane and seed; 

 referring to the winged seeds). Pittnsporaces'. An 

 ornamental evergreen shrub or tree from Australia, 

 cultivated in California for its handsome foliage and 

 profusely produced fragrant yellow flowers. On account 

 of its symmetrical pyramidal habit and its fast growth, 

 it is well adapted for street planting. 



Leaves large, alternate, entire, crowded toward the 



end of the branches: infl. a terminal loose panicle; 

 sepals free; petals 5, with obovate blades and the long 

 straight claws approximated into a tube; stamens 5; 

 ovary incompletely 2-celled, cyUndric, siUcy, with a 

 short .style: fr. a stipitate, compressed caps, with many 

 compressed winged seeds. This monotypic genus is 

 closely related to Pittosporum which differs chiefly in 

 its thick, not winged seeds surrounded by a sticky 

 substance wanting in Hymenosporum. Propagation is 

 hke that of Pittosporum by seeds or cuttings of half- 

 ripened wood. 



flavum, F. Muell. (Pittdsporum flavum, Hook. f.). 

 Shrub or tree, to 50 ft.: lvs. obovate, entire, to 9 in. 

 long: fls. yellow, marked with red at the throat, fra- 

 grant, over 1 in. across: caps, compressed, 1 in. long 

 and nearly as broad. B.M. 4799. R.H. 1913, p. 327. 



Alfred Rehder. 



HYMENOXYS CALIFORNICA: Actinolepis coronaria. 



HYOPHORBE (Greek, food for swine, referring to 

 the fruits). PalmacoF, tribe Chamsdorese. Showy 

 ornamental pabns from Mauritius, often in trade col- 

 lections, and well worthy wider cultivation. 



Trunks unarmed, stout, either cyhndric or in some 

 species with a swelling beneath the If. -cluster: lvs. 

 terminal, equal, pinnatisect, the Hts. almost always 

 opposite, and usually linear-lanceolate; margins 

 recurved toward the base of the 1ft. and thickened 

 throughout; petiole somewhat 3-angled and channelled: 

 spadix short-stalked, many-branched, the branchlets 

 spreading: fls. dioecious or in the different spadices 

 sometimes monoecious, spirally arranged, pale yellow 

 or greenish; sepals and petals 3, the latter small and 

 broadly ovate; stamens 6: fr. somewhat inverted pear- 

 shaped or olive-shaped. — There are only 3 or 4 species, 

 and the genus is most closely related to Chama;dorea, of 

 horticultural palms, from which it differs in its usually 

 dioecious fls. and in having the spadix below the If.- 

 cluster. I.H. 13:462, 463. 



The two species in cultivation are ornamental palms, 

 rather slow-growing and requiring much heat and 

 moisture, and a night temperature of 65°. H. Verschaf- 

 fcitii is much the better of the' two species described 

 below from a horticultural standpoint. Propagation is 

 by seeds, which should be sown in a hght compost or 

 in pure peat with a bottom heat of 80°. The young 

 seedlings are delicate and need protection from chills 

 and over-watering. 



amaricafilis, Mart. (Areca specibsa, Hort.?). St. 

 60 ft. in nature, scarcely so tall in cult., with a bottle- 

 shaped swelling near the base, usually abruptly nar- 

 rowed near the If .-cluster: petiole about a foot long, 

 grooved and angled; Ifts. 40-60 pairs, about 12-16 in. 

 long and 2 in. broad: spadix about 12 in. long: seed 

 elUptic, about J^in. long. Mauritius. 



Verschafieltii, Wendl. (Areca Verschaffeltii, Hort.). 

 Trunk 25-30 ft., about 6 in. diam., bulging about half 

 way up: petiole about 3 in. long, slightly grooved on the 

 upper surface and with a yellow band extending from 

 the upper part of the If.-sheath to the extremity of the 

 blade, which is one of the chief horticultm-al attrac- 

 tions of the species; Ifts. 30-50 pairs, about 2 ft. long 

 and an inch wide: spadix as in the preceding, but the 

 fls. orange: seed nearly cyhndric, about Kin. long. 

 Mauritius. G.W. 12, p. 207. 



H. Commersoninna, Mart, and H. indica, Gaertn. are both Chiys- 

 alidocarpus lutescens. vr TayLOR t 



HYOSCtAMUS (Greek, hog bean). Solanacex. 

 Henbane. A coarse, clammy, ill-smeUing, wayside 

 weed cultivated for medicinal purposes. An extract is 

 commonly sold in drugstores. 



Annual, biennial or perennial, mostly clammy pubes- 

 cent: lvs. alternate, coarsely toothed, or pinnatifid, 

 rarely entire: corolla paUid or lurid and netted- veined, 

 funnel-shaped, with 5 unequal lobes; stamens mostly 



