Pyrola. ERICACEAE. 47 



much narrower than the truncate and usually excavated apex of the style, which 

 forms a ring or collar ; its 5 lobes at first very short and even included, in age 

 commonly protruding, connivent or more, or less concreted : stamens declined- 

 ascending: anthers more or less contracted under the terminal orifices, so as usu- 

 ally to form a neck or short prolongation, the other extremity with either a promi- 

 nent or often an obsolete mucro : hypogynous disk none. Thelaia, Alefeld, 1. c. 

 * Anomalous, perhaps monstrous : petals and leaves acute : flowers ascending. 



P. oxypetala, C. P. Austin. Leaves ovate, coriaceous, an inch or less in length and 

 shorter than the petiole : scape 7 or 8 inches high, naked, 7-9-flowered : calyx-lobes tri- 

 angular-ovate, acute, short : petals greenish, lanceolate-oblong, acuminate (nearly 3 lines 

 long), campanulate-connivent : stamens slightly declined : anthers remaining extrorse, 

 obscurely produced at the openings, the other end conspicuously 1-mucronate : style 

 slightly curved; lobes of the stigma not projecting. Gray, Man. ed. 5,302. Delaware 

 Co., New York, on a wooded hill near Deposit, C. F. Austin, I860. Not since found. 



* # Leaves orbicular, oval, or oblong: petals from orbicular to oblong, very obtuse. 

 -I Calyx-lobes very short and obtuse or rounded, appressed to the greenish-white corolla. 



P. Chlorantha, Swartz. Leaves small (half to an inch in diameter), orbicular or nearly 

 so, coriaceous, not shining, shorter than the petiole : scape 4 to 8 inches high, 3-10-flowered : 

 anther-cells with distinctly beaked tips. Act. Holm. 1810, 190, t. 5 ; Nutt. Gen. i. 273 ; 

 Lodd. Bot. Cab. t. 1542 ; Hook. Fl. ii. 40, t. 134. P. asanfolia, Radius, Diss. 23, t. 4 ; Torr. 

 Fl. N. & M. St. i. 433, not Miclix. Rather dry woods, Labrador to Pennsylvania, Rocky 

 Mountains in Colorado, California 1 to Br. Columbia, and north to subarctic regions. 

 (Eu., N. Asia ?) The E. Asian species allied to this is P. renifolia, Maxim. 



Var. OCCidentalis. Leaves thinner and inclined to ovate. P. occidentalis, R. Br. in 

 herb. Banks ; Don in Wern. Trans, v. 232. Thelaia occidentalis, Alefeld, 1. c. 30, t. 1, f. 6 

 (excl. stamens, which apparently belong to P. secunda, var. minor ?). Alaska to Kotzebue's 

 Sound, Nelson, &c. Rocky Mountains, Bouri/ean. 

 + t Calyx-lobes ovate and acute, short: leaves membranaceous, longer than their petioles. 



P. elliptica, Nutt. Leaves oval or broadly oblong, 14- to 2-i- inches long, acute or merely 

 roundish at base, plicately serrulate : scape a span or more high, loosely several-many- 

 flowered : corolla greenish white: anther-tips hardly at all beaked. Gen. i. 273 ; Radius, 

 1. c. t. 5, f. 1 ; Hook. 1. c. 47, t. 135. P. rotund (folia, Michx. in part. Thelaia elliptica, Ale- 

 feld, 1. c. 47, t. 1, f. 5. Rich woods, Canada to Br. Columbia, and through the N. Atlantic 

 States to the mountains of New Mexico. (Japan.) 



-i -i -f Calyx-lobes from ovate and acute to lanceolate: leaves coriaceous. 



P. rotundifolia, L. Leaves generally orbicular or broadly oval, 1| to 2 inches long, 

 obscurely crenulate or entire, shining above, mostly shorter than the slender petioles : 

 scape a span to a foot high, several-many -flowered, scaly-bracteate : bracts lanceolate or 

 ovate-lanceolate : calyx-lobes lanceolate to ovate-lanceolate, lax or with spreading tips, 

 usually half or one third the length of the white or sometimes flesh-colored petals : anthers 

 with oblong cells contracted into a very short neck under the orifice ; the mucro at base 

 either short and distinct or obsolete. Lam. 111. t. 307, f. 1 ; Engl. Bot. t. 213 ; Schk. Handb. 

 t. 119; Gray, Man. ed. 2, 259, ed. 5, 301. Thelaia rotundifolia, asari folia, bradeosa, inter- 

 media, & grandiflora, Alefeld, 1. c. Sandy or dry woods, from upper Georgia, New Mexico, 

 and California to the arctic regions. (Eu. to Kamtschatka.) With the following varieties 

 or forms, all but the last of which pass into each other freely. 



Var. incarnata, DC. A rather small form : flowers from flesh-color to rose-purple : 

 calyx-lobes triangular-lanceolate. Coldwoods and bogs, Northern New England to the 

 Aleutian Islands. 



Var. asarifolia, Hook. Leaves round-reniform, orbicular-subcordate, or inclined to 

 oblate-orbicular : scape slender : calyx-lobes from ovate-lanceolate to ovate, one third to 

 one fourth the length of the flesh-colored or rose-colored or rarely white petals. Fl. ii. 

 46. P. asarifolia, Michx. Fl. i. 251, in part ; DC. Prodr. vii. 773 (excl. syn. Bigel., Torr., 

 Nutt., & Muhl.) ; Gray, Man. ed. 1, 272. Not uncommon northward and westward to the 

 Rocky Mountains. 



