POLYPETALOUS EXOGENOUS PLANTS. 1C3 



filiform. Torus short, bearing a truncated or emarginate 

 gland on the upper side. Ovary sessile or sliort-stipitate. 

 Style filiform. Ccqjsule silique-like, many-seeded. Annual 

 clammy herbs with palmately trifoliate petioled leaves and 

 racemose flowers. 



P. TRACHYSPERMA. Viscidly pubescent ; leaves 3, foliate; 

 leaflets lanceolate, alternate-acuminate, shorter than the 

 capillary claws of the emarginate petals. Stamens usually 

 16; the filaments deep* purple, twice or thrice the length 

 of the petals; style about the length of the glabrous 

 ovary; 2>ods linear-oblong, turgid, abruptly attenuate at 

 the base, reticulate, glandular-scabrous; seeds turgid, 

 verrucose, muricate. — Drummond, 



15. VIOLET FAMILY. Order, Violace^. 



Herbs with stipulate, alternate, simple, often cleft leaf. 

 Floivers irregular, spurred at base. Sejmls, petals, stamens 

 5. Filaments prolonged beyond the anthers. Pistil 1, 

 with 1 style. Pod 1-celled, witli three rows of seeds on 

 its walls. Roots and juice rather acrid. The common 

 plants of the family belong to the genus. 



VIOLET. Viola, Tourn. Heart's Ease. 



Flower nodding on the summit of the flower-stalk. 

 Style club-shaped ; stigma bent over to one side. Flower- 

 ing in spring, and some species continuing to bloom all 

 summer. 



§ Leaves and peduncles arising from a subterranean rhizoma, icitJwut apparent stems ; 

 perennials, Jlowering in early spring, the later flowers apetalous. 



* Flowers blue. 



V. cucuLLATA, Ait. Smooth or pubesceut ; leaves \o\ig- 

 petioled ; all undivided, varying from cordate-ovate to 

 reniform, serrate, the sides at the base involute when 

 young; the later ones acutish ; lateral petals bearded, stig- 



