146 



POLYMNLA— PORCELIA. 



lanceolate, acuminate, hirsute ; stipules hir- 

 sute, ciliale ; stem erect, glaVjroTis. 1-2 f. S. 



gra'cile, (cr-vv. 0.) dioecious, ^--laucous ; 

 racenjes slender, liliibrm ; tiowers deflected, 

 longer than tlie peduncles; pedniicle artic- 

 ulated to the calyx ; leaves spatulate linear, 

 obtuse ; fruit longer than tlie calyx. 1-4 f. S. 

 P0LYM"NIA. IT— 4. (Cori/mhifera.) [Named 



from Polyhymnia, the muse of eloquence.] 



cana(ien"si$, (y. J. 2-^.) viscid-villose ; 

 leaves denticulate, acuminate, lower ones 

 pinnatifid, upper 3-Iobed or entire. 2-4 f. 

 Flowers in a loose terminal panicle. Shady 

 hills. 



uveda'Iia, (yellow leaf-cup, y. Ju. 11.) 

 leaves opposite, 3-lobed, acute, decurrent 

 into the petiole ; lobes sinuate-angled ; rays 

 elongated. 3-5 f. 

 POLYPO'DIUM. 21—1. (Filices.) [TrompolHS, 



many, and pons, foot, because it has many 



roots.] 



vulga're, (polypod, Ju. 11.) frond deeply 

 pinnatilid ; divisions lance-linear, obtuse, 

 srenulate, approximate, upper ones gradu- 

 ally smaller ; fmit dots solitaiy ; root chaffy. 

 8-12 i. 



}iexagonop"tenim, (Ju. 2/.) fronds bipin- 

 natifid, rather smooth, circumference trian- 

 gular, lower divisions detlexed ; segments 

 lanceolate, obtuse, ciliate, upper ones en- 

 tire, lower ones adnate-decurrent ; sori mi- 

 nute, solitary; stipe smooth. 12-16 i. 



conncc"tile, (Ju. 2^.) fronds bipinnatifid, 

 ciliate, triangular ; divisions opposite, con- 

 tiguous, adnate; segments sub-elliptical; 

 stipe chalfy ; sori minute. 12 i. 



Virginia' num, (Ju. 2i-) fronds deeply 

 pinnatifid ; divisions lanceolate, obtuse, very 

 entire, approximate, upper ones gradually 

 smaller ; sori and root solitary. S. 



inca'num, (Ju. 2^.) fronds deeply pinnati- 

 fid ; divisions alternate, linear, very entire, 

 obtuse, upper ones gradually smaller, scaly 

 beneath ; stipe scaly, fi'uit-bearing at the 

 apex ; sori solitary. S. 

 POLYPRE'MUM. 4—1. {Gentianecc.) [From 



polus, manj, and premnon, stalk or shoot.] 



procum"bens, (w. Ju. @.) stem herba- 

 ceous, procumbent, furrowed, margins of 

 the fuiTOw^s sharply serrulate, dichotomous 

 above ; leaves opposite, linear, sessile, finely 

 serrulate, sub-decurrent. 6-12 i. 

 POLYP"TERIS. 17—1. (Corymhiferae.) [From 



polus, many, and pteris, a wing, alluding to 



the many-valved (or winged) egret.] 



integrifo'lia, [14..) erect; sub-scabrous, 

 branching above ; leaves alternate, sca- 

 brous, entire, linear-lanceolate ; style 2-cleft, 

 longer than the stamens. 3-4 f. S. 

 POLYTRl'CHUM. 21-2. (^hisci.) [From 



polus, many, and thrix, hair, so called from 



its resemblance to hair ] 



juniperi'imm, (hair-cap moss, M. 2^.) 

 stem generally simple ; leaves lance-linear, 

 entire, flattish, somewhat spreading; the 

 apophysis depressed. In dry woods, &c. 

 POMA'RIA. 10—1. {LeguminoscB.) 



glandulo'sa, (y. ^.) branching; glandular- 

 punctate ; branches slender, sub-pubescent ; 

 leaves abruptly bip innate; leafets ovate, 

 oblique at the base, entire, sessile, sub-pi- 

 lose, smooth and pale-gi'een abo^ 2. S. 



PONTEDE'RIA. 6—1. (Narcissi.) {Name 



from an ancient botanist, Pontidera.] 



cordd'f/i. (y)ickerelweed, b. Ju. 2^.) 

 leaves hcMirt-oblong, obtuse; spike many 

 flowered, < "mpact; divisions of the corolla 

 oblong. AM.-, a «^?<s^?/b7i«, leaves elonga- 

 ted, triangi: 'r, truncate, and sub-cordate at 

 the base. 1 .' f. 



POP'OJLUS -JO- 8. {Amentacea.) [The ori- 

 gin of the j.Hme is doubtful.] 



tremuloi'des, (white poplar, American 

 aspen, Ap. '^.) leaves heart-roundish, ab- 

 ruptly acuminate, tooth-serrulate, glabrous, 

 a little pubescent at the margin, with two 

 glands at the base, on the upper side ; peti- 

 oles compressed, in the young state silky. 

 20 30 f. 



bahamife'ra, (balsam poplar. Ap. ^.) 

 leaves ovate, acuminate, w^hite, and net- 

 veined beneath ; buds resinous. 70-80 f. 



angnla'ta, (balm of Gilead, Ap. Tp.) 

 leaves ovate-deltoid, acuminate, glabrous, 

 branches wing-angled. 80 f. 



dilata'ta, (Lombardy poplar, Italian pop- 

 lar, Ap. '^ .) leaves glabrous both sides, acu- 

 minate, serrate, deltoid, the breadth equal 

 to. or exceeding the length ; branches erect, 

 close to the stem. It is said no pistillate 

 plant of this species has been brought to 

 America ; consequently no seeds are ob 

 tained from it. 40-80 f. Ex. 



grandiden"tata, (tree poplar, Ap. ^.) 

 leaves round-ovate, acute, unequally and 

 coarsely sinuate-toothed, glabrous, when 

 young, villose ; petioles compressed. Var. 

 ^c?i''(^?yZa,branches pendulous. 40-50 f. 



hetulifo'lia, (birch-leaf poplar, Ap. ^ .) 

 leaves rhomboidal, long-acuminate, dentate, 

 glabrous ; young branches pilose. 30-40 f. 



canf'dicans, (Ap. Tj».) leaves cordate, 

 ovate, acuminate, obtusely and unequally 

 serrate, white beneath, sub-3-nerved, retic- 

 ular veined ; petioles hairy ; buds resinous. 

 40-50 f. 



IcBviga'ta, (cotton-tree, Ap. '^.) leaves 

 round-ovate, deltoid, acuminate, sub-cor- 

 date, unequally serrate, glabrous, glandular 

 at base; petioles compressed; younger 

 branches angled. 70-80 f. 



heterophyVla, (various leaved poplar, M. 

 ^.) leaves round-ovate, cordate ; the sinus 

 small, cordate and somewhat auricled , 

 when young, tomentose. 70-80 f. 



inoiiolife'ra, (Ap. J?.) leaves sub-cordate- 

 deltoid, glabrous, glandular at the base 

 witli cartilaginous, sub-pillose, hooked ser- 

 ratures ; nerves spreading ; petioles com- 

 pressed above; older branches terete. 

 60-70 f. 



grce^ca, (Athenian poplar, Ap. '^ .) leaves 

 cordate-ovate, acuminate, obsoletely ser- 

 rate ; petioles compressed. 20-40 f. Ex. 

 PORCEL"IA. 12—12. {Annona.) [In honor 



of Porcel, a distinguished Spanish botanist.] 



triloba, (custard apple, paw-paw, p. Ap. 

 ^.) leaves smoothish, oblong-wedge-obo- 

 vate; outer petals orbicular; fruit large, 

 fleshy. 30-40 f. 



parvific/ra, (g-p. M. ^.) leaves wedge- 

 obovate, mucronate, under surface and 

 branches rufous-pubescent; outer petal» 

 scarcely twice as long as the calyx. 2 f *Sf 



