H YD 



OR, BOTANICAL DICTIONARY. 



H-YM 



723 



10. Hydrocotyle Linifolia. Leaves linear-lanceolate, hir- 

 sute, entire. It resembles the preceding, but has longer 

 leaves and peduncles. Native of the Cape. 



11. Hydrocotyle Tomentosa. Leaves obovate, toothed, 

 tomeutose ; root caulescent, branched on the surface of the 

 earth. The whole plant hoary, tomentose ; peduncles lateral 

 next the lower leaves, and of the same length with them ; 

 receptacle of the flowers very dark purple; petals white. 

 Native of the Cape. 



12. Hydrocotyle Tridentata. Leaves wedge-shaped, trifid, 

 villose. Native of the Cape. 



13. Hydrocotyle Ranunculoides. Leaves five-parted, 

 gashed ; stem creeping, jointed ; umbels simple ; petals white. 

 Native of Mexico, discovered by Mutis. 



14. Hydrocotyle Erecta. Leaves cordate, crenate ; scapes 

 the length of the petioles, having a few flowers at the top. 

 Native of Jamaica. 



15. Hydrocotyle Moschata. Leaves kidney-form, seven- 

 lobed, serrate, villose; umbels many-flowered. Native of 

 New Zealand. 



Hydrolca; a genus of the class Pentandria, order Digy- 

 nia. GENERIC CHARACTER. Calix: perianth five-parted; 

 parts oblong, acute, unequal, permanent. Corolla: one- 

 petalled, wheel-bell-shaped; tube shorter than the calix ; 

 limb five-parted, spreading ; segments ovate, incumbent. 

 Stamina: filamenta five, awl-shaped, cordate at the base ; 

 antherae oblong, curved, incumbent. Pistil: germen ovate; 

 styles two, filiform, spreading ; stigmas truncate. Pericarp: 

 capsule ovate, two-celled, two-valved ; partition contrary. 

 Seeds: very many, minute, imbricated, with an ovate large 

 receptacle. Observe. In some flowers the calix and corolla 

 are six-cleft, with six stamina. ESSENTIAL CHARACTER. 

 Calix: five-leaved. Corolla : wheel-shaped. Filamenta : cor- 

 date at the base. Capsule: two-celled, two-valved. Tie 



species are, 



1. Hydroiea Spinosa ; Prickly Hydrolea. Stem with axil- 

 lary spines; flowers clustered, terminating; spines axillary, 

 spreading. Native of South America. 



2. Hydrolea Inermis; Unarmed Hydrolea. Stemunarmed; 

 flowers solitary, lateral, blue ; corolla wheel-bell-shaped. 

 Annual. Native of moist places near Canton in China. 



3. Hydrolea Zeylanica. Stem unarmed; flowers subra- 

 cemed ; leaves lanceolate, alternate, petioled, oval-oblong, 

 quite entire, sharpish, even ; peduncles opposite to the leaves, 

 axillary, or terminating, one-flowered; corolla blue. Native 

 of the East Indies. 



4. Hydrolea Trigynia. Stem spiny; leaves oblong, hirsute; 

 flowers three-styled, axillary. Native of the West Indies. 



Hydrophylax ; a genus of the class Tetrandria, order Mo- 

 nogynia. GENERIC CHARACTER. Calix: perianth one- 

 leafed, upright, four-parted, superior, permanent ; segments 

 ovate, acute, margined, somewhat fleshy. Corolla : one- 

 petalled, funnel-form; tube longer than the calix; limb 

 angular, four-cleft; segments ovate, revolute; throat bearded. 

 Stamina: filamenta four, placed on the tube, decurrent, up- 

 right, longer than the corolla ; antherse subhastate. Pistil: 

 germen oblong, inferior; style filiform, curved ; stigma bifid. 

 Pericarp : berry juiceless, ovate, compressed, with three 

 ribs on each side, the middle one higher, with an attenuated 

 margin, a little bowed in, fungous, two-celled, with a trans- 

 veise partition. Seeds: solitary, oblong, bowed in a lit-tle, 

 three-sided, two-grooved on the inner side, somewhat rugged. 

 ESSENTIAL CHARACTER. Calix: four-parted. Corolla: 



funnel-form. . Fruit : ancipital, one-seeded. The only 



known species of this genus is, 



1. Hydrophylax Maritima. Root simple, filiform, blood- 



red, long, fleshy, sweet; stem creeping, filiform, smooth, 

 coloured, jointed, sheathed with blunt, membrauaceous, per- 

 manent sheaths, very long; leaves opposite, spreading, ovate- 

 acute, quite entire, approximating, fleshy, shining; flowers 

 axillary, subsessile, usually two together, but not opposite, 

 erect; corolla pale blue; antherce blue. It has the appear- 

 ance of Arenaria Rubra Maritima, but is larger. Found in 

 the driving sand upon the sea-shore near Guduluhr in the 

 East Indies. 



Hydrophyllum ; a genus of the class Pentandria, order 

 Monogynia. GENERIC CHARACTER. Calix: perianth five- 

 parted, scarcely shorter than the corolla, spreading, perma- 

 nent, with awl-shaped segments. Corolla: one-petalled, bell- 

 shaped, five-cleft; segments upright, obtuse, emarginate. 

 Nectary a cleft closed by two longitudinal converging plates, 

 fastened to the pe.tal within the middle of each segment. 

 Stamina: filamenta five, awi-shaped, longer than the corolla; 

 antheroe incumbent, oblong. Pistil: germen superior, ovate, 

 acuminate; style awl-shaped, the length of the stamina; 

 stigma bifid, acute, spreading. Pericarp : capsule globular, 

 one-celled, two-valved. Seed: single, round, large; (accord- 

 ing to Gsertner, four, resting within a berried receptacle.) 

 ESSENTIAL CHARACTER. Corolla: bell-shaped, having five 

 longitudinal melliferous streaks uu the ineirlp. Sti(/ma : bitid. 

 Capsule : globular, two-valved. The plants of this genus 

 endure cold well, but require to be planted in a moist rich 

 soil, and shady situation, and will not thrive in a warm dry 

 soil unless constantly watered in dry weather. They may be 

 increased by parting the roots in autumn, and will require 



abundant watering, if not well rooted before the spring. 



The species are, 



1. Hydrophyllum Virginicum ; Virginian Water-leaf. 

 Leaves pinnatifid. The root is composed of many strong 

 fleshy fibres, which spread wide on every side ; from this 

 arise many leaves on footstalks five or six inches long, of a 

 lucid green. The flowers rise with footstalks from the root, 

 having one or two small leaves of the same shape with the 

 lower; they are in loose clusters hanging down, and of a 

 dirty white colour, making no great show; seeds regularly 

 four, but often fewer, nestling in the receptacle, irregularly 

 ovate and angular, elegantly netted, with very minute exca- 

 vations. It flowers here in May and June, sometimes ripen- 

 ing seed in August. Native of moist spongy ground in Vir- 

 ginia and Carolina. 



2. Hydrophyllum Canadcnse ; Canadian Water-leaf. 

 Leaves lobate, angular. It has the same structure as the 

 preceding, differing only in the leaves, which have the same 

 shape as those of the Maple. It flowers in May; and is a 

 native of Canada. 



3. Hydrophyllum Appcndiculatum. Plant very rough ; 

 radical leaves somewhat winged; bunches of flowers subpa- 

 niculate ; flowers pale blue, the calix extremely hispid, and 

 almost the length of the corolla. Found on shady rocks 

 near springs in Virginia; also near Harper's Ferry, Tennessee, 

 North America. 



4. Hydrophyllum Lineare. Leaves linear ; branches elon- 

 gated. Found by Mr. Lewis on the banks of the Missouri. 



Hymenaa; a genus of the class Decandria, order Mono- 

 gynia. GENERIC CHARACTER. Calix: perianth one-leafed, 

 coriaceous; tube short, turbinate, compressed, permanent, 

 with an oblique mouth; limb five-parted, almost regular, 

 upright, deciduous; segments ovate, blunt; two opposite, 

 flatfish, a little broader; two others concave, with one side 

 narrower. Corolla : five-petalled, inserted into the neck of 

 the calix, somewhat subpapilionaceous ; petals almost equal;, 

 banner, the two uppermost petals obliquely ovate, obtuse, 



