AN ENCYCLOPAEDIA OF HORTICULTURE. 



169 



Hypericnm continued. 



H. olympicum (Olympian). /. large, few ; peduncles bibracteate. 

 Summer. I. elliptical-lanceolate, rather acute, full of pellucid 

 dots, glaucous. Stem round, shrubby, h. 1ft. to 2ft. Mount 

 Olympus, 1706. Greenhouse evergreen. 



H. orientale (Eastern). /. appearing in summer. 1. stern- 

 clasping, linear, obtuse, erect, fringed with glandular hairs. 

 Stem shrubby, slender, with two angles, erect and jointed. 

 h. 6in. to 12in. Levant. Half-hardy perennial. 



H. patulum (spreading).* /. corymbose ; peduncles bibracteate. 

 Summer. I. ovate-lanceolate, acute, tapering to the base, with 

 revolute margins, without dots. Stem round, purplish, herba- 

 ceous. A. 6ft. Japan. Hardy. (B. M. 5693.) 



FIG. 261. DEHISCING CAPSULE AND PORTION OF INFLORESCENCE 

 OF HYPERICUM PERFORATUM. 



H. pcrforatum (perforated).* Common Hypericum ; St. John's 

 Wort. jl. bright yellow, in a handsome terminal corymb; 

 sepals lanceolate, pointed, quite entire, but with a few glandular 

 lines or dots ; petals marked with black dots. Summer and 

 autumn. I. sessile, oblong, marked with pellucid dots and 

 occasionally a few black ones on the under side. h. 1ft. to 3ft. 

 Temperate regions of Northern hemisphere (Britain). Hardy 

 perennial. See Fig. 261. (Sy. En. B. 268.) 



H. prolificum (prolific), ft. few, corymbose. Summer. I. linear- 

 lanceolate, with revolute edges, full of pellucid dots. Stem 

 round, shrubby ; branches angular. h. 1ft. to 2ft. North 

 America, 1758. Hardy. 



H. pyramidatum (pyramidal). Jl. few, large ; peduncles short, 

 thick. Summer. I. stem-clasping, oblong-lanceolate, acute, with 

 revolute margins. Stem winged, herbaceous. A. 4ft. North 

 America, 1764. Hardy. 



H. triflorum (three-flowered). Jl. solitary ; peduncles terminal, 

 usually in threes. Summer. 1. membranous, ovate - oblong, 

 bluntish, full of pellucid dots. Stems terete, shrubby. Moun- 

 tains of Java. Half -hardy. (Gn. xxiii. 158.) 



H. nralum (Urala). /. terminal, somewhat corymbose. Summer. 

 I. elliptical, mucronulate, smooth, shining. Branches compressed, 

 two-edged, h. 2ft Nepaul. Hardy shrub. (B. M. 2375.) 



HYPH2ENE (from hyphaino, to entwine ; alluding 

 to the fibres of the fruit). Doom, Doum, or Gingerbread 

 Palm. OED. Palmae. A genus of about nine species of 

 fan-leaved stove palms, natives of tropical Africa, Arabia, 

 and the Mascarene Islands. Flowers dioecious ; males in 

 twos, females solitary. Leaves terminal, orbicular, or 

 nearly so, with sword-shaped acute or bifid segments. 

 Stems unarmed, tall or of medium height, simple or 



Vol. II. 



Hyphsene continued. 



dichotomously branched. Probably the only species in 

 cultivation is H. thebaica, a plant which is difficult to 

 cultivate. Tt thrives best in rich sandy loam, and may 

 be increased by imported seeds. 



H. thebaica (Theban). I. large, fan-shaped, in a terminal tuft, 

 whence arises the branched inflorescence. Stem branched, each 

 branch ending in a tuft of leaves. A. 40ft. Upper Egypt and 

 Nubia, 1828. The wood of this tree is extremely hard, and is 

 employed in the manufacture of various domestic utensils. (F. d S 

 2155-3.) 



HYPOCALYMMA (from hypo, under, and kalymma, 

 a veil; calyx falling off like a veil or cape). OBD. Myr- 

 tacecB. A genus containing twelve species of ornamental 

 greenhouse evergreen shrubs, limited to Western Aus- 

 tralia. Flowers axillary, in pairs, or rarely three or four 

 together in each axil, sessile or shortly pedunculate, with 

 three scarious bracts or bracteoles under each flower. 

 Leaves opposite, usually larger than in Bceckea, entire, 

 or with crisped edges. The species require a compost of 

 loam and peat, to which a little sand is added. Cuttings 

 of young shoots will root in sand, under a bell glass. 

 Probably the two species here described are the only 

 ones yet introduced. 



H. angnstlfolinm (narrow-leaved). /. white or pale pink, in 

 sessile pairs, but often in the axil of one only of each pair of 

 leaves. May. I. narrow-linear, rigid, channelled above or semi- 

 terete, rarely rather broader and concave, obtuse or acute. A. 1ft. 

 to 3ft. 1843. SYN. H. suave (under which name it is figured in 

 B. R. 1844, 28). 



H. robnstum (robust), ft. pink, axillary, on short pedicels ; heads 

 many-flowered. May. I. linear-lanceolate, mucronate. A. 2ft. 

 1842. (B. R. 1842, 8.) 

 H. suave (sweet). A synonym of H. angustifolium. 



HYPOCALYPTUS (from hypo, under, and kalypto, to 

 hide ; named from a covering to the unopened flower, observ- 

 able in most of the species so-called by Thunberg, but 

 which are now referred to Podah/ria ; the character does 

 not seem applicable to the only species that remains in 

 the genus). ORD. Leguminosae. A monotypic genus. 

 The species is an ornamental greenhouse evergreen shrub, 

 thriving in a peat and loam compost. Cuttings of the side 

 shoots will root, during April, in sand, under a hand glass. 

 H. obcordatns (obcordate).* ft. purple. June and July. 1. tri- 



foliolate ; leaflets obcordate, mucronate. A. 1ft. to 2ft. Cape of 



Good Hope, 1823. (B. M. 1913 ; B. R. 128 ; B. M. 3894, under 



name of Crotalaria jnirpurea.) 



HYPOCRATERIFORM. Salver-shaped; having a 

 long slender tube and a flat limb, as in the Primrose. 



HTPOCYK.TA (from hypo, under, and kyrtos, curved, 

 gibbons ; the under part of the corolla tube exhibits a con- 

 spicuous gibbosity). OKD. Gesneracece. A genus com- 

 prising about ten species of much-branched stove shrubs, 

 natives, for the most part, of Brazil. Flowers axillary 

 and solitary, or several together ; calyx deeply five-parted. 

 Leaves opposite, entire, or sub-dentate. For culture, see 

 Gesnera. 



H. glabra (smooth). /., corolla rich scarlet, with a short con- 

 striction at the base of the tube ; limb orange-yellow ; calyx seg- 

 ments serrated ; peduncles one to three, in the axils of the leaves, 

 longer than the petioles, with a pair of linear bracts at the base. 

 June and July. I. opposite, elliptical, obtuse, glossy, very 

 minutely hairy, on short petioles. Stem dark purple, erect, un- 

 branched, succulent. A. Sin. to lOin. South America, 1846. 

 (B. M. 4346.) 



H. Strigillosa (strigillose). ft. scarlet, yellow, axillary, solitary ; 

 corolla much swollen in front; limb contracted, five-toothed. 

 May. I. oblong, acuminate, mucronate, strigillose. Stem erect, 

 villous above. A. 2ft. Brazil. (B. M. 4047.) 



HYPODEMATIUM. A synonym of Lissochilus 



(which see). 



HYPODERRIS (from hypo, under, and derris, a skin ; 

 in reference to the cover of the circular sporange). ORD. 

 Filices. A genus of two species of stove ferns, closely 

 allied to Woodsia. Sori sub-globose, in lines or series 

 parallel with the secondary veins ; involucre calycifonn, 

 fimbriated at the margin. Probably the second species, 



Z 



