138 



PENNISETUM— PEUCEDANUM. 



um, fp .) peduncles sub-5-flowered ; loaves 

 round cordate, very soft. 



C. Leaves simple, more or less angled, or 

 lohed. 



zona'Ie, (horse shoe geranium, ^.) umbels 

 many-flowered ; leaves heart-orbicular, ob- 

 Boletely-lobed, toothed, with a colored zone 

 around or near the margin. 



in' quinans, (scarlet geranium, ^ .) umbels 

 many-flowered ; leaves round-reniform, 

 hardly divided, crenate, viscid-downy. 



ncer/fo'Uiim, (Icnion or maple-leaf gera- 

 nium, 9 .) umbels about .5 flowered ; leaves 

 5-lobe-palmate, serrate ; below wedge-form, 

 undivided. 



capita' turn, (rose-scented geranium, Ip.) 

 flowers capitate ; leaves cordate, lobed, 

 waved, soft ; stem diffuse. 



quercifu'lium, (oak-leaf geranium, '^.) 

 umbels sub many-flowered ; leaves cordate, 

 pinnatifid, crenate; sinuses rounded; fila- 

 ments ascending at the apex. 



grave' olciis, (sweet-rose geranium, Ip.) 

 umbels many-flowered, sub-capitate ; leaves 

 palmate, 5 lobed ; divisions oblong, obtuse ; 

 margins revolute. 



PENNISE'TUM. 3—2. (Graminea.) [Penna, 

 a feather, and seta, a bristle, from the feath- 

 ery appearance of the involucre] 

 glau'cum, (fox-tail paiiic, J. ^.) perfect 

 floret transversely rugose ; involucre of 

 many fascicled bri.stles, scabrous upwards ; 

 spike cylindrical. Var. purpuras" cens, 

 sheaths hairy ; glumes and bristles of the 

 involucre hairy. Introduced. 2 f. 



pun"gens, (11.) spike terete, strict; in- 

 volucre many-parted, 1-flowered ; segments 

 terete, subulate, rigid, scabrous, a little 

 longer than the florets. S. 



PENTIIO'RUM. 10—5. (Sempervivce.) 



sedoi'des, (Virginian orpine, g-y. Ju. 2/.) 

 stem branching, angled ; leaves lanceolate, 

 sub-sessile, unequally and densely serrate ; 

 spikes secund, terminal, panicled, alter- 

 nate and cymed ; seeds pitted. 12-18 -i. 

 S. 



PENTSTE'MON. 13—2. {Bignonem.) [From 

 pente, five, and sterna, stamen. This plant, 

 though it is placed in the class Didynamia, 

 has the rudiment of a fifth stamen ; from 

 hence its name.] 



pubp.s"cens, (beard-tongue, w-p. J. 2^.) 

 stem hairy; leaves serrulate, lance-oblong, 

 sessile ; flowers panicled ; the barren fila- 

 ment bearded from the apex to below the 

 middle. Var. latifo'lia, has broad, smooth 

 leaves. Var. angustifi/lia, has narrow, 

 hairy, obscurely denticulate leaves. 1-2 f. 

 Hill-sides. 



Iceviga'tum, (p. J. 11.) smooth; leaves 

 ovate-oblong, clasping at the base, slightly 

 toothed, the lower ones entire ; flowers 

 paniculate; sterile filament bearded near 

 the top. 1-2 f. Low grounds. 



fruf.es'' cens, (p. \> .) stem fruticose ; 

 branches angled, pubescent above ; leaves 

 lanceolate, ob.soletely denticulate, sessile, 

 nearly glabrous ; raceme terminal, eub- 

 corymbed ; sterile filament bearded. 12- 

 18 i. 



grand: fiu rum, very glabrous; leaves 

 half-clasping, ovate-oblong, entine ; upper 

 ones roundish ; flowers solitary and axilla 

 ry ; sterile filament partly pubescent at the 

 summit; segments of the calyx oblong, 

 acute. 



gra'cih, (p. J.) stem smooth, slender 

 leaves smooth, linear, acute, half-clasping, 

 sharp-serrnlate ; sterile filament bearded 

 longitudinally; segments of the calyx lin- 

 ear-oblong. 12-24 i. 



cosru'leum, (b. 11.) smooth ; radical leaves 

 linear, entire; cauline ones lance-linear, 

 entire ; all sessile ; sterile filament short, 

 bearded above ; segments of the calyx lan- 

 ceolate, acute, glabrous. S. 



erian"thera, (p. J. 11.) stem and leaves 

 glabrous ; leaves sessile, lance-ovate, entire, 

 sub-undulate at the margin ; peduncles 

 many-flowered, secund ; segments of the 

 calyx round-oval, acuminate ; sterile fila- 

 ment slightly bearded under the retuse 

 point ; anthers pubescent. S. 



al' bidum. (w.) low ; leaves lance-ovate, 

 sub-serrulate, smooth, sessile ; flowers sub- 

 fascicled, axillary and terminal ; sterile fila- 

 ment slenderly and interruptedly bearded ; 

 segment of the calyx lance-linear, pubes- 

 cent. 6-8 i. S. 



dissec'-'tum, (p.) leaves opposite, sessile, 

 glabrous, compoundly dissected ; segments 

 linear and generally obtuse ; flowers in 

 panicles ; .stigma simple. 2 f. S. 



campanula' his, produces light purple 

 flowers, from Mar. to Oc. 18 i. Ex. 



ro'seus. has red flowers. Ex. 



murraya'nus, the most beautiful species ; 

 grows about two feet high, and produces 

 brilliant scarlet flowers in Auguit. Ex. 



PERIPLO'CA. 18—5. {Apocynea.) [From 



peri, about, and ploke, twining.] 



grce'ca, (milk-vine, p. m. ^ .) climbing ; 

 leaves opposite, ovate, acuminate ; flowers 

 hairy within, and terminal. A native of the 

 Canary Isles. 

 PETALOS"TEMON. 16—8 {Les;uminosa.) 



[From petalon, a petal, and sterna, a stamen, 



the petals and stamens united form a tube ] 



can" didum, (w. Ju. 11.) spike cyrindric, 

 peduncled; bracts longer than the flower; 

 calyx glabrous ; leaves lanceolate, in 3 

 pairs. 



viola'ceum, (rp. Au. 2/ ] bracts about 

 equal to the calyx ; little bracts spatulate, 

 caducous ; calyx silky ; leaves linear, in 2 

 pairs. 



villo'sum, (r. Au. 11) villous; stem de- 

 cumbent; spike large, cylindric, sub-ses- 

 sile ; bracts shorter than the woolly, 5-tooth- 

 ed calyx; leafets linear-oblong, about 7 

 pairs. 



carne'nm, (w. Ju. 2^.] spike cylindric, 

 pedunculate; bracts suDulate, as long as 

 the glabrous calyx ; leafets lanceolate, en- 

 tire, small. 2-3 f. S. 



corymbo'sum, (w. S. li) peduncles in 

 panicled corymbs ; calyx plumose ; leafets 

 linear, unawned, glabrous. 2 f. Dry sandy 

 pine barrens. S. 

 PEUCEDA'NUM. 5—2. {UmbeUifereae.) [From 



peuke, fir, which its leaves resemble, anH 



