BLADDERWORT FAMILY. 333 



3. AFHYI.IiON, NAKED BROOM RAPE or ONE-FLOWERED 

 CANCER ROOT. (Greek: without leaves.) Flowers spring and 

 early summer. 



A. unifl6rum, Gray. Open woods or thickets ; slightly clammy- 

 pubescent, with 1-3 scapes (3'-5 ; high) from a subterranean scaly base, and 

 lance-awl-shaped calyx lobes half the length of the violet-purplish corolla. 



A. fasciculatum, Gray. Occurs only from N. Mich., W. ; has scapes 

 from a scaly base rising out of the ground, and short triangular calyx 

 lobes. Parasitic on herbs, as Artemisia, etc. 



LXXXIII. LENTIBULARIACE^E. BLADDERWORT 

 FAMILY. 



Aquatic or marsh herbs, with the ovary and pod 1-celled and 

 containing a free central placenta, with irregular bilabiate 

 flowers (lower lip larger and 3-lobed), bearing a spur or sac 

 underneath, and 2 stamens with confidently 1-celled anthers. 

 Flowers on 1-few-flowered scapes. 



1. UTEICTJLAEIA. Calyx parted into 2 nearly entire lips. Corolla deeply 2-Hpped, the 



lower lip bearing above a prominent palate closing the throat, and below a large spur. 

 Anthers 2, converging in the throat of the corolla. Stigma 2-lipped. Leaves finely 

 cut, mostly into threads or fibers, many bearing little air bladders ; some are leafless. 



2. PINGUICULA. Upper Up of calyx 3-cleft, lower 2-cleft. Lips of corolla distinctly 



lobed, the hairy or spotted palate smaller, so that the throat is open ; otherwise as in 

 TTtricularia. Leaves all in a tuft at base of the 1-flowered scapes, broad and entire, 

 soft and tender. 



1. UTRICULARIA, BLADDERWORT. ( Utriculus, a little bladder.) 

 Flowers all summer. The following are the commonest species. 



* Plants floating by means of the hollow petioles of the upper whorled 



leaves. 



U. inflate, Walt. Swimming free, the petioles of the whorl of leaves 

 around the base of the 5-10-flowered scape inflated into oblong bladders, 

 besides little bladders on the thread-like divisions of the leaves ; corolla 

 yellow, large. Still water, Me. and S., near the coast. 



* * Plants floating, the dissected leaves usually bearing little bladders on 



their lobes. 



- Flowers yellow. 

 ** Pedicels recurved in fruit. 



U. vulgaris, Linn. Common in still or slow water ; the stems l-3 

 long and very bladder-bearing on the thread-like, many-parted, crowded 

 leaves ; flowers 5-10 in the raceme, large, with spur rather shorter than 

 lower lip ; the corolla closed. 



U. minor, Linn. Leaves scattered; 2-4 times forked ; scapes lower 

 and weak, 2-8-flowered ; corolla gaping, the spur very short and blunt or 

 almost none. Shallow water, N. States. 



w- t-f Pedicels erect in fruit. 



U. gfbba, Linn. Small, with short branches bearing sparse thread- 

 like leaves and some bladders, 1-2-flowered scape only l'-3' high, 



