46 ENGLISH BOTANY. 



Sub-Order III.— PYROLEiE. 



Calyx wholly free from the ovary. Corolla deciduous, of 5 free 

 petals. Ovary superior, without a disk. Anthers 2-celled, open- 

 ing by 2 pores. Pollen-grains united in fours. Fruit a capsule. 

 Testa loosely enveloping the seed. 



Undershrubs or herbs, with evergreen leaves. 



GENUS IX.— P YROLA. Tournef. 



Calyx free from the ovary, 5-cleft or 5-partite. Corolla hypo- 

 gynous, deciduous, of 5 distinct petals. Stamens 10, hypogynous ; 

 anthers 2-celled, introflexed, opening by 2 pores close to the inser- 

 tion of the filament. Style filiform, erect or declinate ; stigma 

 capitate, 5-angular or with 5 short rays. Capsule sub-globose, 

 5-lobed, 5-celled, splitting loculicidally, the valves remaining at- 

 tached at the apex. Seeds very numerous, enveloped in a loose 

 testa resembling an arillus. 



Small undersbrubs, with roundish oval or obovatc evergreen 

 leaves, and white or pink flowers in terminal racemes or umbellate- 

 corymbs, or solitary. 



The seed-coat is remarkably like that of Drosera, on which 

 account M. Cosson places Pyrola and Monotropa in Droseracea', 

 with which they also agree in their polypetalous flowers. 



The generic name is a diminutive from pyrus, a pear-tree, the leaves of which 

 those of the Winter-greens are supposed to resemble. 



Sub-Genus I.— EU-PYROLA. 



Petals 5, distinct, concave, more or less connivent. Anther- 

 cells generally not produced into horns, but opening by pores 

 close to the insertion of the filaments. Stigma with 5 short 

 blunt lobes. Capsule with the valves connected by fibres after 

 dehiscence. 



SPECIES I.— PYROLA ROTUNDI FOLIA. Linn. 

 Plates DCCCXCV. DCCCXCVI. 



Leaves all in a terminal rosette, coriaceous, orbicular or 

 broadly-oval, abruptly contracted into the petioles, or sometimes 

 even subcordate at the base, rounded at the apex, rcpand or 



