,30 PTEROSPORA-PYRUS. 



PTEROSPOKA. 12—1. (Ericoi.) [From pleron, a wing, spora, seed.] 

 andro)ii"tda, (Albany beech-drops, r-y. Ju. ©.) scape purple, very tall, bear* 

 iug a many-flowered raceme ; flowers lateral and terminal, nodding ; pe- 

 duncles fllilbrm, longer than the flowers; lanceolate scales below, none 

 above. 1-2 f. 



FULMONARIA. 5 — 1. (^Boraginem.) [From ;jMfmo, the lung, so called on account of its effi- 

 cacy in diseases of the lungs.] 



virgin"ica, (b. M. J. %.) smooth ; stem erect ; radical leaves obovafe, oblong, 

 obtuse leaves of the siem narrower ; flowers in terminal racemes or fasci- 

 cles ; calyx much shorter than the tube of the corolla; segments lanceolate, 

 acute ; leaves somewhat glaucous ; flowers large, bright blue. Plant be- 

 comes black by drying. 



crffidna'lis, (spotted lung-wort, b. M. %.) leaves ovate, hairy, generally speck- 

 led with white on the upper side; the lower leaves on long petioles, the 

 upper ones sessile ; flowers violet-blue. 13 i". Ex. 



PUNIC A. 1 1 — 1. {Rosacea.') [From punicus, Carthaginian.] 

 grajin'hnn, (pomegranate, T2.) leaves lanceolate ; stem woody, Ex. 



PYCNANTHEMUM. 13—1. (Labiatcb.y [From pzt^raos, dense, aw^Aos, flower, on accooRt of 

 its crowded inflorescence.] 



A. Stamens exsert. 



in"canum, (wild basil, mountain mint, w. r. Ju. 'Zj.) leaves oblong-ovate, acute, 

 sub-serrate, white-downy ; flowers in compound heads, lateral ones pedun- 

 cled ; bracts setaceous. 1-5 f. 



arista' tuvi, (w. Au. %..) leaves lance-ovate, sub-serrate, on very short petioles, 

 whitish; heads sessile; bracts awned ; flowers very small, in one or two 

 sessile whorls and a terminal head ; bracts and calyx terminated by long 

 awns. 



linifd'lium, (Virginian thyme, w.Ju. '2]..) stem straight, much branched, some- 

 what scabrous; leaves linear, 3-nerved, very entire, smooth; heads termi- 

 nal, in a fasciculate corymb, stem 12-18 inches high, with trichotomous, fas- 

 tigiate branches; flowers minute, shorter within. Woods. 

 B. Stamens included. 



verticilla'tum, (w. Au. %.) leaves lance-ovate, sometimes toothed ; whorls ses- 

 sile, compact ; bracts acuminate. 2 f. Mountains. 



lanceola'tmn, leaves linear-lanceolate, entire, veined ; heads terminally ses- 

 sile, in fascicled corymbs. 

 PYROLA. 10—1. (Erica.) [From;jyrMS, a pear, so called on account of the shape of the leaf.| 



rotundifo'lia, (shin-leaf, pear-leaf wintergreen, w. J. %.) style declined ; leaves 

 rounded, or broad-oval,obsoletely serrulate, sub-coriaceous, shining; petiole 

 about as long as the lamina; scape many-flowered. 6-12 i. 



dlip"tica, (g-w. Ju. 'i|-.) leaves membranaceous, elliptical-ovate, serrulate, ra- 

 ther acute, lamina longer than the petiole; scape nearly naked; bracts sub- 

 ulate; calyx 5-toothed ; style declined ; scape 10 i. 



asarifo'lia, (g-w. Ju. %.) leaves reniform, coriaceous, half as long as the dila- 

 ted petiole ; raceme many-flowered ; stigma clavate ; the disk elongated and 

 5-lobed. Dry woods. 



secun'da, (one-sided wintergreen, g-w. Ju. %') stamens erect; style straight j 

 leaves ovate, acute; secund. 2-3 i. Sandy woods. 



unijlo'ra, (J. %.) flower solitary; leaves orbicular, serrate; stigma acute j 

 style straight, 5-toothed ; flower terminal, large, white, fragrant, nodding. 

 Chiefly in northern latitudes; rare. 

 PYRUS. 11—5. (Rosaceai.) [Origin of the name doubtful] 



corona'ria, (crab-apple, w, r. M. l^.) leaves broad-oval, at the base rounded, 

 sub-angled or sub-lobed, serrate, smooth; peduncles corymbed. Flowers 

 sweet-scented. 



commu'nis, (pear, w. r. M. T^.) leaves ovate, serrate, (rarely entire ;) peduncles 

 corymbed. Ex. 



ma'lus, (apple, w. r. M. Yi.) flowers in sessile umbels ; leaves ovate-oblong, 

 acuminate, serrate, glabrous ; claws of the petals shorter than the <'.alyx_; 

 styles glabrous. Var. sylvestris, (wild-apple,) leaves oyate, serrate, frui. 



