KEY. 137 



Calyx scarcely with a tube, deeply 6- (or 5-) parted. 

 Petals and stameDS as many as the calyx-lobes. Pod 1-cell- 

 ed ; placenta globose, with few seeds. Perennials. Leaves 

 lanceolate, punctate, sessile. Flowers small, in dense thyr- 

 soid racemes. Naumburgia thyrsiflora, Moench. 



144. (135.) Style 1, with 1 or several stigmas (some- 

 times deeply 2- to 5-parted) 145 



Two or more styles or sessile stigmas 175 



145. Stamens 5, or else 10 filaments, only half of them, 

 . the alternate ones, anther-bearing 146 



Stamens 6-12 163 



146. Filaments 10, sometimes united in a tube, the 5 al- 

 ternate ones without anthers 147 



Sterile stamens none ; 5 fertile stamens only, some- 

 times more or less united 148 



147. The filaments united in a 10-toothed tube, the 5 al- 

 ternate teeth anther-bearing, the rest naked. Sepals and 

 petals 5. Pod 3-celled ; seeds many. Root-stocks tufted, 

 sending up long-petioled, round-heart-shaped, crenate-dentate 

 leaves and a slender scape, bearing a dense raceme of white 

 flowers. Gaiax aphylla, L. 



Filaments not united into a tube. Sepals and pe- 

 tals 5. Style with 5 stigmas (5 styles united). Fruit rostrate, 

 of 5 coherent membranous pods, tipped with the long, spiral 

 style, bearded inside. Flowers umbellate. Hairy, common- 

 ly prostrate. Leaves pinnate ; leaflets sessile, pinnatifid, in- 

 cised, acute. Erodioiu cicutarium, L'Her. 



148. Filaments united at the base. Style 5-cleft or 

 parted — that is, consisting of 5 partly united styles. Sepals 

 3-nerved, with rough, glandular margins. Petals sulphur-yel- 

 low. Pod of five united carpels, imperfectly 10-celled. 

 Leaves linear. Herb with a tough, fibrous bark. Flowers 

 racemed on the corymbose branches. 



Linum Boottii, Planch. 

 Filaments not united with each other 149 



149. Thorny trees, with abruptly once- or twice- pinnate 

 leaves, and small, greenish flowers in short spikes. Thorns 

 above the axils, 3- to several-branched. 



(92) Gleditscliia (844). 



