PRINOS-PTERIS. 129 



acatt'7w,. (primrose, Tj..) leaves rugose, toothed, hirsute benealh ; scape l-flo-n-- 

 ered. Ex. 



aurid'ula, (auricula primrose, %.) leaves serrate, fleshy, obovate ; scape many- 

 flowered ; calyx mealy. Ex. 



ve'ri%, (cowslip, r-y. %.) leaves rugose, toothed ; limb of the corolla concave; 

 neck of the tube oblong; calyx inflated. 



ela'tior, (oxlip primrose, w. y. %..) stalk many-flowered; limb of the coroEa 

 flat; flowers in an umbel, pale yellow, the centre deeper yellow ; this is sup- 

 posed to be a hybrid, between the primrose and cowslip. 



vulga'ris, the English botanists describe the acaiulis under this name ; it is the 

 polyanthus of the florist. 

 PRINOS. 6—1. {Rhamni.) 



veriicilla'tus, (winter berry, w. J. Vj.) stem much branched ; leaves deciduous, 

 oval, serrate, acuminate, pubescent beneath ; flowers dioecious, Gcleft; ste- 

 ril ones axillary, sub-umbellate ; fertile ones aggregated, berries globose. 

 Berries bright scarlet. 6-8 f Swamps. 



glabcr, leaves evergreen, wedge-form, coriaceous, shining ; pedicels axillary, 

 mostly 3-flovvered ; berries black and shining, globose. 3-4 f. Ink-berry. 



I'ROSERPINACA. 3 — 3. (Hydrocharidee.) [From Proserpina, fabled as queen of the lower 

 regions.] 



palus"tris, (mermaid-weed, Au. ©.) upper leaves lance-linear, serrate; lower 

 ones often pinnatifid ; fruit angular, acute, stem procumbent. Wet places. 



fcctina'ta, distinguished from the former, by having the leaves all finely pec- 

 tinate, and the fruit with rather obtuse angles. 

 PRUNELLA. 13 — 1. (Labiatm.) [From prMwa, a burn, because it heals bums.] 



vulga'ris, var. pennsylvanica, (heal-all, self-heal, J. %.) leaves petioled, ob- 

 long-ovate, toothed at the base ; lips of the calyx unequal ; upper one trun- 

 cate, awned ; stem ascending. 6-12 i. 

 PRUNUS. 12-1. {Rosacea.) [Pn<nus, the Latin name for plum.] 

 A. Floxoers in racemes. 



Virginia' na, (wild-cherry, rum-cherry, cabinet-cherry, w. M. T^.) racemes 

 erect, elongated; leaves oval-oblong, acuminate, unequally serrate, glabrous 

 both sides ; petioles generally bearing 4 glands. In open fields, the limbs of 

 this tree spread out into an elegant oval top; but in dense forests, it grows 

 to a very great height, with a few contracted branches. 



seroti'na, (choke-cherry, w. J. Ij.) flowers in lax racemes; leaves oval, short- 

 acuminate, opake, doubly and acutely serrate ; midrib bearded on each side 

 towards the base ; petiole with 2 glands. 



canaden"sis, (w. T^.) flowers in racemes; leaves glandless, broad-lanceolate, 

 rugose, sharply serrate, pubescent both sides, tapering into the petiole. 



spMto'.'5«, (English sloe, Tt.) peduncles solitary ; leaves lance-oval, pubescent 

 beneath ; fruit straight ; branches thorny. Ex. 



cera'sus, (garden cherry, w. r. I^-) umbel sub-peduncled; leaves lance-ovate, 

 glabrous, conduplicale. Ex. 



domes"lica, (plum, w. M. 17.) peduncles sub-solitary; leaves lance-ovate, con- 

 volute; branches thornless. Yar. Juliana, (damson plum,) fruit oblong, 

 blue. Var. claudiana, (sweet plum, horse-plum,) fruit round, at first 

 green, becoming yellowish. Var. enucleata, (stoneless plum,) the putamen 

 obsolete. Ex. 



P80RALEA. 16—10. (.Leguminosts.) [From psoralens, scabby ; the plant being more or less 

 glandular, which gives it a scurfy appearance.] 



esculen"tfi, (bread-root, b. J. 7|..) villose, leaves quinate-digitate, leafets lance- 

 olate, unequal, flat, entire, spikes axillary, den.se-flowered ; divisions of the 

 calyx lanceolate, scarcely as long as the corolla; legume ensiform, beaked; 

 root fusiform. The root is used for food by the Indians. 



PTERIS. 21—1. (Filices.) [From pJeron, a wing, so called from the likeness of its leaves to 



wings.] 



aquili'na, (common brake, Ju. %.) frond pinnate, 3-parted ; barren branches 

 doubly pinnate, with leafets lance-linear, obtuse pinnatifid, toothed; fertile 

 branches pinnate, with leafets pinnatifid ; divisions aculish, all ciliate. 



