HIERACIUM—HYACINTHUS. 
HIERACIUM. 17—1. ( Cichoracecu .) [From hierax. a hawk.] 
veno'sum , (vein-leaf hawkweed, y. Ju. flj..) scape naked, corymb-panicled, 
glabrous ; leaves lance-obovate, with thin hairs above, and naked beneath, 
margin ciliate, glandular-toothed, veins coloured; calyx glabrous. 1-2 f. 
auranti'acum, (orange hawkweed, y. scape leafy, hispid ; flowers co- 
rymbed; peduncles glomerate; leaves oblong, acutish, pilose-hispid. Ex. 
JcaV'mii , (y. Au. flj..) stem erect, sub-villose ; leaves sessile, lanceolate, acumi¬ 
nate, sharply and divaricately toothed; panicle sub-corymbose ; pedicels 
downy. 2 f. 
HIPPOPHiE. 20—8. (JEleagni.') [From ippos, a horse, phao } to destroy.] 
canadevJ'sis , (sea buckthorn, M. 77 .) leaves ovate, nearly smooth above, ar- 
genteus beneath. 6-8 f. 
« argen"teci , both sides of the leaves covered with silver scales. 12-18 f. 
HIPPIJRIS. 1—1. ( Naides .) [From ippos, a horse, oura, tail.] 
vulga'ris , (mares-tail, y-g. M. %.) leaves linear, and lance-linear, verticillate. 
HOPEA. 15—12. ( Malvaceae ,.) [Dr. John Hope,] 
tincto'ria , (sweet leaf, y. Ap. k>.) leaves lance-oblong, glaucous, pubescent be¬ 
neath; flowers sessile, axillary, in clusters. 15-18 f. 
HORDEUM. 3—2. ( Gramincb .) 
juba'tum , (J. J'.) lateral florets abortive, awns of the calyx and corolla 6 times 
as long as the flowers. 2 f. 
vulga're , (barley, Ju. ©.) florets all perfect, awned, in two eject rows. Ex. 
HORTENSIA. 10—3. ( Caprifolia .) 
specio'sa , (changeable hydrangea, r. and w. J. T^.) leaves broadly-ovate, ser¬ 
rate, acuminate; flowers corymbed. From the East Indies. This is the 
common flower-pot shrub called hyderindia, and by corruption of this word 
hyderanga. 
HOTTONIA. 5—1. ( Lysimachice .) [John Hotton.] 
infla'ta , (water feather, Ju. Q|.) stem thick, generally submersed; scape 
jointed; flowers whorled, on peduncles ; leaves long, pectinate. Stagnant 
waters. 
HOUSTONIA. 4—1. ( Gentiana .) [Dr. Houston.] 
cceru'lea , (innocence, Yenus’-pride, b. and w. M. flj-.) stem erect, setaceous, 
dichotomous; radical leaves spatulate; cauline ones oblanceolate, oppo¬ 
site; peduncles 1-flowered, elongated. 4-6 i. 
longifo'lia , (b-w.) leaves narrow; flowers terminal, nearly sessile. 
purpu'reo^ purple flowers in terminal corymbs. 
HUDSONIA. 12—1. ( Cesti .) 
erico'ides, (false heath, 3 ^. J. 17 .) pubescent; stem suflruticose, sub-erect; 
branches elongated; leaves filiform, subulate; peduncles lateral, elongated; 
calyx cylindrical, obtuse; capsule pubescent; 1-seeded. 4-6 i. Pine barrens. 
tomento'sa , hoary-pubescent. Sea-shore. 
HUMULUS. 20—5. ( Urticcn .) [From humus, the ground, because, without support, it trails 
on the ground.] 
lu'pulus , (hop, g-y. Au. flj..) stem twining with the sun ; leaves lobed. One of 
the best of tonics. 
HYACINTHUS. 6—1. ( Asphodeli .) [Said to have been named from the friend of Apollo, 
who, according to the poets, was changed into this flower.] 
orienta'lis , (garden hyacinth, r. Ap. 9-1-.) corolla funnel-form, half 6-cleft, 
ventricose at the base. Ex. 
mus"cari : (musk hyacinth, r. Ap. Qj-.) corollas ovate, all equal. Ex. 
botryo'ides, (grape hyacinth, b. Ap. Of.) corollas globose, uniform ; leaves cv- 
lindric, channelled, straight. Ex. 
racemo'sus , (hare-bell hyacinth,) flowers thick, ovate, those at the top sessile ; 
leaves lax pendent, linear.. 
como'sus , (purple grape-hvacinth,) corollas angular-cylindric; upper flowers 
long-peduncled. 
