PARTHENIUM -PELARGONIUM. 



137 



nated by little spherical "heads. Damp or 

 wet. 6-18 i, 



palns"tru, leaves all cordate, cauline 

 ones sessile ; scale smooth, many-bristled ; 

 tlowerfl wliite, with veins of green or pur- 

 ple. Bog meadows. 



parvijln'ra, very slender, with slender, 

 bristly scales, about 5 ; radical leaves ovate, 

 tapering into the petiole ; cauline ones lin- 

 ear, oblong-sessile. 



Jimbiia'ta, scales broad, wedge-fonn, 

 fleshy, crenate in the middle, within keel- 

 ed, naked ; radical leaves long-petioled, ear 

 kidney-form ; cauline ones cordate, sessile, 

 inserted much above the middle ; petals 

 fringed at the base. 



asarifo'lia, (Ju. Au. 2^.) radical leaves 

 reniform ; petals clawed ; nectaries 3-cicl"t. 

 S. 



PARTHE'NIUM. 17—4. {Corymhifera.) 



ill teg-rift)' Hum, (w. S. Z^.) leaves oblong, 

 unequally-toothed, rough ; upper ones clasp- 

 ing. 1-2 f. 



PAS'TALUM. 3—2. (Graminea.) [From pas- 



palos, millet, wliich this plant resembles in 



its seeds.] 



cilintifn'lmm, (S. 2^.) stem decumbent; 

 leaves hairy, ciliate ; spikes 1-2, indistinctly 

 3-rowed. 18 i. 



seta'ceum, (paspalon-grass, ZJ[.) culm 

 erect ; leaves and sheaths villose ; spike 

 generally solitary ; flowers in 2 rows. Sandy 

 fields. 1-2 f. 



de'btle, stem weak; leaves and stem hairy; 

 spike generally one, slender; flow^ers alter- 

 nate, 1-rowed. S. 



Jlorida' iinm, (J. S.) erect ; lower leaves 

 very villose ; upper ones scabrous, hairy ; 

 sheaths long ; spikes few ; flowers in 2 

 rows, glabrous, large. 3-4 f. 



pros' COT, (J.) erect; leaves lanceolate- 

 linear, glabrous; spikes many, alternate; 

 rachis nairow. hairy at base ; flowers 3- 

 rowed. Damp soil. S. 



dis"tichum, (creeping paspalura, joint- 

 grass. 2^.) stem creeping; leaves short, 

 somewhat glaucous, shining; spikes 2, one 

 sessile; glumes lanceolate. IS. 



PASSIFLO'RA. 15—5. (Cucurhitacem.) [Tiie 

 - term Jlos passionis, or passion-llower, was 

 before the time of Linnasus, applied to this 

 beautiful genus, because the in.struments 

 of Christ's passion were thought to be rep- 

 resented by the parts of the flower.] 

 cccru'lca, (blue passion-flower, b. Ju. ^.) 

 \eavcs palmate, 5-parted, entire; petioles 

 glandular; involucrum 5-leaved, entire ; 

 threads of the crown shorter than the co- 

 rolla. Ex. 



lulefa, (yellow passion-flower, y. S. 2^.) 

 (eaves cordate, 3-lobed, obtuse, nearly 

 jmooth ; petioles without glands ; pedun- 

 cles axillary, in pairs ; petals much longer 

 than the calyx ; stem climbing and slender. 

 Banks of streams. 



incaraa'ta, (w. p. Sept. 2^.) leaves 

 jmooth; petioles with z glands; involu- 

 :runi 3-leaved ; leafets lanceolate, glandu- 

 lar-.serrate ; stem long, climbing; petals 

 wliite ; nectary purple, longer tlian the 

 corolla ; fruit sub-acid and spongy, eatable. 



ala'ta, (winged passion-flower, Oct. ^.) 

 leaves oblong ovate, sub-cordate, entire, 

 veiny; petioles with 4 glands; stipules 

 lauco-falcate ; stem 4-cornercd. Ex. 



pella'ta, ( 1? .) leaves p(^ltate, deeply 3- 

 lobed, glabrous ; lobes lance linear ; petioles 

 with 2 glands ; peduncles solitary, axillary ; 

 petals 0. S. 



wa'rei, {21.) lower leaves 3-lobed, acute 

 upper ones undivided, ovate ; petioles with 

 2 glands ; peduncles somewhat in pairs. 

 4-G i. S. Cer. lou'dojii, flowers of a most 

 brilliant crim.son. Ex. 



PASTINA'CA. 5—2. (Umbellifcra:.) [From 

 pasco, to feed.] 



sati'va, (parsnip, y. Au. $ .) leaves sim- 

 ply pinnate; leafets glabrous. Yax.arvcn"sis, 

 leafets sub-pubescent. This variety is often 

 found in situations which almost prove it to 

 be indigenous. 

 PEC'TIS. 17—2. {Corymhifera;.) 



anguiitifo'liuR, (y. %.) stem branching at 

 the base, diffuse ; leaves narrow-linear, 

 mucronate, denticulate at the base ; teeth 

 terminating in hairs ; flowers terminal, soli 

 tary, short peduncled ; involucrum 8-leaved; 

 chaff t^hort, .'5-toothed. 1-2 i. 

 PEUICULA'RIS. 13—2. {Pedicular es.) [From 



pcdiculus, a louse.] 



canaden"sis, (louse-wort, y-p. M. 2^.) 

 stem simple ; leaves pinnatifid, gash-tooth- 

 ed ; heads leafy at the base, hirsute ; corol- 

 la with a setaceous, 2 toothed upper lip ; 

 calyx obliquely truncate. 6-12 i. 



paVlida, (y. Ju. 2^.) stem smooth, branch- 

 ed; leaves sub-opposite, lanceolate, pin- 

 natifid, toothed and crenate, scabrous on 

 the margin ; helmet of the corolla truncated 

 at the apex; calyx bifid, with roundish 

 segments. 1-2 f. 



resvpina'ta, (p. Ju. 11) stem simple, 

 glabrous; leaves lanceolate, toothed, cre- 

 nate; calyx bifid-truncate ; upper lip of the 

 corol acute. Canada. 



hirsu'ta, (r. 2^.) stem simple; leaves pin- 

 nate; leafets lanceolate, obtusely-toothed; 

 calyx hirsute, 5-cleft ; upper lip of the co- 

 rolla very obtuse. 



ela'ta, (p. Ju. li.) stem simple; leaves 

 deeply pinnatifid; divisions lance-linear, 

 crenate; spike lax, somewhat leafy; calyx 

 glabrou.s, 5-toothed; upper lip of the corol- 

 la obtuse, truncate. 2 f. 



gladia'ta, (y-p. J. I^.) stem simple ; leaves 

 lanceolate, pinnatifid, toothed ; spikes leafy, 

 hairy ; flowers alternate ; capsule termina- 

 ting in a long, flat point. 1 f. 

 PELARGO'NIUM. 15—7. {Gerania.) [From 



pelarifos, a stork, on account of the shape 



of tlie pericarp, which resembles a stork's 



bill.] 

 A. Nearly stemless ; roots tuberous. 



iris"tc, (mourning geranium,) umbel 

 simple ; leaves rough-haired, pinnate ; leaf- 

 ets bi-pinnalifid ; diviftious oblong-acute , 

 flowers dark green. 



daucifo'hum, (carrot geranium. If.) scape 

 very simple ; leaves thrice pinnate, hirsute ; 

 leafets lance-linear. 



B. Leaves simple, not angled. 



odorntis"Rimxim, (sweet-scented gerani- 



