170 PRACTICAL BOTANY. 



Corolla usually withering on the summit of the pod, which 

 opens by a lid. Stems 2-5 inches high. Leaves ovate, ob- 

 long, or spatulate-oblong. Flowers nearly sessile, small, 

 white, axillary. Centunculus minimus, L. (365). 



349. Style distinct and slender, with a capitate, or 

 2-lipped stigma, deciduous. Anthers spiral. Corolla funnel- 

 form, or salver-shaped, 4- (or 5-) cleft, in withering twisted on 

 the pod. Low herbs, 2-3 inches high. Flowers rose-purple 

 or reddish. Erythrsea (375). 



Style (if any) and stigmas persistent. Anthers 

 straight 350 



350. Corolla with a glandular spot or a little, hollow spur 

 to each lobe 351 



Corolla without glands or spurs 352 



351. Corolla 4-parted, wheel-shaped, with a glandular 

 and fringed pit on the upper side of each segment. Fila- 

 ments awl-shaped, usually monadelphous at the base. 

 Stigma 2-lobed. Leaves whorled. Flowers greenish-yellow, 

 numerous, pedicelled, in open cymes. 



Frasera Caroliniensis, Walt. 

 Corolla 4- (or 5-) cleft, bell-shaped, and with a little 

 spur at the base of each lobe. Stem leafy, 9-18 inches bigh, 

 simple or branched above. Leaves 3- to 5-nerved, lance- 

 oblong or oblong-spatulate. Flowers yellowish, in terminal 

 fascicles. Halenia deflexa, Griseb. (3*76). 



359. Calyx of 2, leaf-like sepals. Corolla tubular-bell- 

 shaped, 4 lobed. Obolaria Virginica, L. 

 Calyx of 4 or 5 segments 353 



353. Calyx and corolla 4-parted, the latter with no plaits 

 at the sinuses. Bartonia. 



Calyx 4- (or 5-) cleft. Lobes of the corolla some- 

 times fringed or toothed ; its sinuses often with a crown of 

 ])laited folds ; its bottom sometimes bearing glands between 

 the bases of the filaments ; anthers either separate or coher- 

 ing with each other, and either fixed by the middle or by the 

 deep sagittate base. Seeds winged or wingless. Flowers 

 solitary or cymous. Gentiana (376). 



354. (345.) Herbs with scapes. Stamens much exserted. 



