402 



LXXXIII. PAENASSIE^. 



Francoa, 

 Transverse section of ovary (mag.)- 



Francoa. 

 Seed, entire and cut vertically (mag.)- 



Francoa, 

 Ovule (mag.). 



terminal racemes. Caltx 4-partite. Petals 4, rarely 5, inserted at the base of 

 the calyx, clawed. Stamens inserted with the petals, 8 or 10 fertile alternating 

 -with as many sterile ; filaments distinct, subulate ; anthers introrse, 2-ceUed, 

 dehiscence longitudinal. Ovaet free, tetragonous, oblong, 4-lobed at the top, 

 4-celled; stigma sessile, with four lobes alternating with the cells; ovules numerous, 

 2-seriate at the central angle of the cells, horizontal, anatropous. Capsule loculi- 



cidal. Seeds numerous, tuberculate and striate, 

 the axis of a fleshy albumen. 



Embryo straight, cylindric, in 



GENERA. 



Francoa. 



Tetilla, 



Francoacem are Chilian herbs, placed near Crasmlacece and Saxifrageai. They approach the latter 

 ill the polypetaloua perigynoiis diplostemunous corolla, many-ovuled ovarian cells, anatropous ovules, 

 capsular fruit, straight albuminous embryo, herbaceous stem, alternate leaves, and racemed flower ; they 

 are scarcely separated but by the contorted aestivation of the corolla, sterile stamens, sessile 4-lobed 

 stigma, and dehiscence of the capsule. They approach Crassulucece in the perigynous and diplostemonous 

 petals, the horizontal anatropous ovules, capsular fruit, herbaceous stem, and alternate leaves. They 

 have also some connection with Lythrarieoi in the corolla, stamens and ovary ; but the embryo in Lyth- 

 rariece is exalbuminous, and the leaves are opposite. 



LXXXIII. PARN ASSIES, Endlicher. 



Perennial glabrous heebs. Stems scape-like, simple, 1 -flowered. Radical 

 LEAVES long-petioled, cordate [oblong] or reniform, cauline sessile. Flowbes J, 

 regular, white or yellowish. Caltx 5-partite, imbricate, persistent. Petals 5, 

 perigynous, alternate with the sepals, imbricate in Eestivation, deciduous. Stamens 

 6, fertile, [hypogynous or perigynous,] inserted alternately with the petals ; filaments 

 subulate ; anthers extrorse, 2-celled, ovoid or sub-globose, dehiscence longitudinal ; 

 ■petaloid scales 5, opposite to the petals, perhaps representing bundles of sterile 

 stamens, and dividing into 3, 6, 7, 9, or 15 branches, each terminated by a globose 

 nectariferous gland. Ovary superior (P. palustris), or semi-inferior (P. himalayensis, 

 &c.), 1-celled, with 3-4 parietal placentas; stigma sessile, 3-4-partite; ovules 

 numerous, anatropous. Capsule 1-celled, with 3-4 semi-placentiferous valves. 

 Seeds very small ; testa membranous, reticulate, loose, extending beyond the endo- 

 pleura. Embryo exalbuminous [or albumen scanty], straight,, oblong-cylindric. 



