io6 Introduction to Botany. 



i-celled, with numerous ovules on a free, central, placenta. Stigma 1-2- 

 lipped, either sessile or borne on a short style. Capsules bursting 

 irregularly or dehiscing by valves. 



I. UTRICULARIA. Bladderwort. 



(L., tttrtcuius, a little bladder.) 



Herbs, either floating free or rooted, the aquatic species having finely 

 dissected leaves bearing numerous small bladders which are bristled 

 at the orifice. Flowers few or solitary on slender scapes, prominently 

 jsersonate. (See Fig. 73, p. 145.) 



1. Utricularia vulgaris, L. (L., vulgaris, common.) Greater Bladder- 

 wort or Hooded Water Milfoil. Flotiting free, the branches becoming some- 

 times I foot long. Scapes 3 to 14 inches high with few or no scales. Divisions of 

 the leaves capillary, bearing numerous bladders. Racemes 3-20-flowered. Corolla 

 yellow, about 2 inch broad, the spur conic and somewhat curved, shorter than the 

 slightly 3-lobed lower lip. Pedicels recurved in fruit. In ponds and slow streams. 



i!. Utricularia minor, L. (L., minor, smaller.) Lesser Bladderwort. 

 Floating free. Leaves scattered, dichotomously branched into a few setaceous 

 divisions. Bladders among the leaves, few and often none. Scapes slender, 3 to 7 

 inches high, bearing i-io flowers. Corolla pale yellow, ^ inch broad or less. Spur 

 very much reduced, or hardly apparent. Pedicels recurved in fruit. In bogs and 

 shallow ponds. 



OROBANCHACE.^. Broom Rape Family. 



Root parasites, from nearly white to brownish or purplish, with 

 leaves reduced to scales, and irregular, perfect flowers, which are ses- 

 sile in spikes or peduncled and solitary in the axils of scales. Calyx 

 gamosepalous, 4-5-toothed or cleft, sometimes divided on one or both 

 sides. Corolla gamopetalous, more or less 2-lipped, the upper lip 2- 

 lobed or entire, lower lip 3-lobed ; throat of the tubular corolla ringent. 

 Stamens 4, didynainous, alternate with the lobes of the corolla and 

 inserted on its tube. Ovary superior and l-celled, with numerous 

 ovules on 2-4-parietal placents. Capsule i -celled and 2-valved. 



I. APHYLLON. Waked Broomrape. 

 (Gr., a, without; phyllon, leaf.) 



Brownish or whitish herbs. Scapes naked. Flowers purplish or 

 whitish on long, glandular-pubescent peduncles. Calyx campanulate, 

 about equally j-cleft. Corolla somewhat 2-lipped, the upper lip 2-lobed 

 and the lower 3-lobed. Stamens included. The 4 placentae equidistant 

 or grouped in pairs. 



