590 PYROLA. [CLASS X. OXDXR I. 



** PARNASSIOIDES. Koch. Filaments awl-shaped, ascending, thick 

 and triangular at the base. Anthers with two divergent tubular 

 pores. Valves of the capsules with smooth edges. Veins of the 

 leaves prominent only on the under side. 



5. P. uniflo'ra, Linn. (Fig. 670.) Single-flowered Winter -green. 

 Flower terminal, solitary; leaves ovate, rotundate, serrated; stigmas 

 large, with five oblong large spreading rays. 



English Botany, t. 146. English Flora, vol. ii. p. 258. Hooker, 

 British Flora, vol. i. p. 192. Lindley, Synopsis, p. 175. 



Root fibrous, wilh long creeping underground slender stems, rarely 

 branched. Stem angular, smooth, scarcely more than an inch high, 

 scaly at the base. Leaves opposite, or in whorls of three, mostly only 

 with a simple whorl, sometimes two, ovate or roundish ovate, on short 

 footstalks, mostly dilated, and slightly channeled above, the mid-rib 

 slender, with numerous slender netted veins, prominent on the under 

 side only, and not on the upper, as in the above section, the margins 

 more or less distinctly and regularly sharply serrated, quite smooth, 

 paler on the under side. Flower solitary, terminal, large, white, very 

 fragrant, on a peduncle, from three to four inches long, erect, haviug 

 near the lop one or two ovate bracteas. Calyx in five ovate oblong 

 spreading segments, obscurely seven ribbed, finely fringed on the 

 margins. Corolla mostly near an inch across, in five ovate petals, 

 numerously veined. Stamens about half as long as the petals, the 

 filaments awl-shaped, triangular and thick in the lower part, but not 

 dilated, deflexed, and then curved upwards, bearing large yellow two- 

 celled two lobed anthers, opening at the apex with a remarkable tubular 

 appendage, curved and perforated at the end. Style stout, erect, with 

 a large stigma, formed of five oblong fleshy lobes, spreading out in a 

 star-like manner. Capsule globose, depressed around the persistent 

 style, five lobed, five valved, five celled, bursting at the angles from 

 the base, the margins of the valves smooth, without any connecting 

 web. Seeds numerous. 



Ha bitat. Woods in Scotland ; rare. Firwood, near Brodie House, 

 Forres ; Woods at Scoune. Mr. Bishop. Coul, Ross-shire. Sir G. 

 S. Mackenzie, Bart. In the Oak Wood, Knock of Alves, near Elgin. 

 Mr. Lawson. 



Perennial ; flowering in July. 



Besides the species of Pyrola here described, there are two others 

 found on the Continent, the P. chlorantha, Swartz. and P. umbel- 

 latum, Linn. The former, it is not improbable, will be found growing 

 with us ; it is nearly allied to P. rotundifolia, from which it is distin- 

 guished by the calyx segments being ovate acuminate, not lanceolate; 

 but in other respects it is the same. 



