194 



LENTIBULARIACEAE. 



[Voi,. III. 



2. Pinguicula vulgaris L. But- 



terwort. Bog or Marsh Violet. 



(Fig- 3357-) 



Pinguicula vulgaris L- Sp. PI. 17. 1753. 

 Scapes glabrous, or minutely puberu- 

 lent, 2 / -6 / bigb. Leaves 3-7 in a rosette 

 at the base of the scape, greasy to the 

 touch on the upper surface, ovate to 

 lanceolate, obtuse, i / -2 / long, 3 // -io // 

 wide, short-petioled, or sessile; corolla 

 violet-purple, 3 // -4 // broad when expand- 

 ed, 2-lipped, the upper lip 2-lobed, the 

 lower 3-lobed, larger, the tube gradually 

 contracted into an acute or obtuse nearly 

 straight spur 2 // -4 // long; capsule glo- 

 bose ovoid, longer than the calyx. 



On wet rocks or in gravelly rivulet beds, 

 Newfoundland and Labrador to Alaska, 

 south to Vermont, northern New York, 

 Minnesota and British Columbia. Also in 

 Greenland, Europe and northern Asia. 

 Other English names are Beanweed, York- 

 shire Sanicle, Sheep-root or -rot, Rot-grass, 

 Sheep-weed, and Steep- or Earning-grass, 

 from its use in curdling milk. July-Aug. 

 Pinguicula alpina L- is reported to have been collected in Labrador but not sufficiently authenti- 

 cated. It may be known by its recurved obtuse conic spur, not one-half as long as the lower lip of 

 the corolla. 



Family 29. OROBANCHACEAE Lindl. Nat. Syst. Ed. 2, 287. 1836. 



Broom-rape Family. 

 Erect, simple or branched, brown yellowish purplish or nearly white root- 

 parasites, the leaves reduced to alternate appressed scales, the flowers perfect, 

 irregular (rarely cleistogamous), sessile in terminal bracted spikes, or solitary 

 and peduncled in the axils of the scales. Calyx inferior, gamosepalous, 4-5- 

 toothed, 4-5 -cleft, or split nearly or quite to the base on one or both sides. 

 Corolla gamopetalous, more or less oblique, the tube cylindric, or expanded 

 above, the limb 2-lipped, 5-lobed. Stamens 4, didynamous, inserted on the 

 tube of the corolla and alternate with its lobes, a fifth rudimentary one occasion- 

 ally present; filaments slender; anthers 2-celled, the sacs parallel, equal. 

 Ovary superior, 1 -celled, the four placentae parietal; ovules numerous, anatrop- 

 ous; style slender; stigma discoid, 2-lobed, or sometimes 4-lobed. Capsule 

 1 -celled, 2-valved. Seeds numerous, reticulated, wrinkled or striate; embryo 

 minute; cotyledons scarcely differentiated. 



About 11 genera and 200 species of wide geographic distribution, mcstly in the northern hemis- 

 phere. 



Flowers all complete and perfect. 

 Calyx 2-5-toothed. 



Calyx about equally 5-cleft; no bracts on pedicels nor calyx. 1. Thalesia. 



Calyx unequally toothed, or split on both sides; flowers bracted. 2. Orobanche. 



Calyx spathe-like, split on the lower side, 3-4-toothed on the upper. 3. Conopholis. 



Lower flowers cleistogamous, fertile; upper complete, mostly sterile. 4. Leptamniam. 



i. THALESIA Raf. Am. Month. Mag. 2: 267. 1818. 

 [Anoplanthus Endl. Icon. Gen. PI. 12. pi. 72. 1838.] 

 [Aphyixon A. Gray, Man. 290. 1848.] 

 Glandular or viscid-pubescent simple-stemmed herbs, parasitic on the roots of various 

 plants, with scattered scales, and long-peduncled yellowish white or violet, complete and per- 

 fect bractless flowers. Calyx campanulate or hemispheric, nearly equally 5-cleft, the lobes 

 acute or acuminate. Corolla oblique, the tube elongated, curved, the limb slightly 2-lipped, 

 the upper lip erect-spreading, 2-lobed, the lower spreading, 3-lobed, the lobes all nearly 

 equal. Stamens included; anther-sacs mucronate at the base. Ovary ovoid; placentae 

 equidistant, or contiguous in pairs; style slender, deciduous; stigma peltate, or transversely 

 2-lamellate. [Dedicated to Thales.] 



About 3 species, natives of North America. 

 Stem very short; peduncles 1-4, erect; calyx-lobes lanceolate, 'acuminate. 1. T. uniflora. 



Stem erect, 2' -5' high; peduncles several; calyx-lobes broad, acute. 2. T.fasciculata. 



