224 PYROLACE,*:. 



ORDER LXXIV. PYROLACE^E. WINTERGREENS. 



Sepals 5, persistent. Corolla regular, deciduous, 4 5-parted. 

 Stamens twice as numerous as the divisions of the corolla ; an- 

 thers 2-celled, opening by pores. Ovary superior, 4 5-celJed ; 

 style 1 ; stigma indusiate. Fruit capsular, 4 5-celled. Seeds 

 many, minute, winged. Herbaceous plants, rarely under shrubs, 

 with simple leaves. 



1. PYROLA. Linn. Wintergreen. 



(A diminutive of the Latin pyrus, a pear ; from the resemblance of its leaves.; 

 Calyx minute, 5-cleft or 5-parted. Petals 5. Stamens 10, 

 slightly united at base. Anthers opening by 2 pores at base. 

 Stigma 5-lobed. Capsule 5-celled. 



* Flowers in racemes. Sutures of the capsules woolly. 

 f Stamens ascending. Style declined. Stigma annulate. 



1. P. rotundifolia Linn. : leaves roundish, entire or slightly crenulate, 

 coriaceous and shining, scarcely as long as the dilated petiole j scape many- 

 flowered, bracteate ; calyx 5-parted, the segments ovate-lanceolate ; stigma 

 obtusely 5-toothed. 



var. asarifolia Hook.: leaves larger, reniform-roundish. P. asarifolia 

 Mich. 



Woods. Can. to Car. W. to Mich. July. ^.Leaves all radical, 1$ 2 

 inches in diameter, on petioles as long or longer. Scape 8 12 inches high. 

 Flowers nodding, white, fragrant, 8 20 in a raceme. The largest of the species. 



Round-leaved Wintergreen. 



2. P. chloranlha Swart z : leaves orbicular, retuse, obsoletely crenulate, 

 half as long as the narrow petiole ; scape nearly naked ; raceme few- 

 flowered ; segments of the calyx very short, obtuse ; stigma with the disk 

 5-lobed. 



Woods. Can. and N. Y. June. 11. Leaves about an inch long, varying 

 from orbicular to broad-obovate. Scape 6 8 inches high. Flowers 5 8 in a 

 raceme, greenish- white, odorous. Greenish-flowered Wintergreen. 



3. P. elliptica Nutt. : leaves elliptic-ovate, membranaceous, serrulate, 

 longer than the dilated petiole ; scape naked or with a single subulate bract ; 

 calyx 5-cleft, very short, the segments ovate ; stigma clavate, 5-lobed. 



Dry woods. Can. to Virg. July. 1\-. Leaves all radical, membranaceous, 

 finely serrate, with an attenuated "base, much longer than the petiole. Scape 

 6 10 inches high, about 5-angled. Flowers 8 12 in a raceme, greenish-white, 

 fragrant. Distinguished from P. rotundifolia, by its longer, thin and dull leaves, 

 and shorter calyx. Thin Leaf. 



4. P. uliginosa To-rr. <f* Gr. : leaves nearly orbicular, obscurely crenate- 

 denticulate, coriaceous, longer than the petiole ; scape bracteate ; raceme 

 many-flowered ; calyx one-fourth as long as the petals ; the segments broad- 

 ovate, acute : stigma with 5 small erect teeth. 



