ORDER 82. PLANTAGINACE^E. 213 



7 L. longilolia Ph. St. slender, flexuous, 4-angled; Ivs. linear, shining, revolute at 



edge ; flf. large, in pairs or 4's, terminal on the stem or short branches ; petals broad* 

 ovate, erose-dentate ; anthers large. Low prairies. W. and S. KW. July. 

 8. Hniii*. Leaves lance-linear, flat, edges not revolute. Miss, and La. 



8 !L. lanceolata Walt. St. angular above; leaves lance-oblong, acute at each end, 



subsessile, veiny, ciliatc at base; ped. solitary, axillary. Meadows. 12 18'. July. 

 0. heterophylla. Lower Ivs. oval or oblong, petiolate; flowers at the summit. 



9 Ii* ciliiita L. St. erect, 4-angled ; Ivs. opposite, ovate to lance-ovate, rounded at 



base, petioles distinct, dilate ; flowers nodding, mostly opposite, in the upper axils, 



large (10 ; stamens distinct. Thickets, along streams. 2 3f. Often branched. Jl. 



/3. tonga. Pet. entire, destitute of ciliae ; Ivs. and fls. smaller. Mts., Ky., Term. 



10 L. radicans Hook. St. square, long, trailing, rooting at the joints ; br. slender; 

 Ivs. lance-ovate, acute, on long pet. ; fls. small (4 //r ). Swamps, Va., and S. 2 4f. Jl. 



9. ANAGALLJS, L. SCARLET PIMPERNEL. Calyx 5-parted. Cor. 

 rotate, deeply 5-parted, tube 0. Sta. 5, hairy, anth. introrse. Caps, globu- 

 lar, thin, opening all around (pyxis). Herbs with square stems and oppo- 

 site or whorled entire leaves. Pedicels axillary, solitary. Fig. 249. 



A . arvensis L. Procumbent ; Ivs. broad-ovate, sessile, shorter (& 10") than the curved 

 ped. ; sepals lance-linear, as long as the roundish crenate-glandular, red petals. (T) 

 Fields, waysides. The flowers (sometimes blue, Dr. Buel) close at 2 p. M., or on the 

 approach of foul weather ; hence called the Poor Man's Weather-glass. 



10. CENTUNCULUS, L. FALSE PIMPERNEL. Cal. 4-parted. Cor. 

 urceolate-rotate, 4-cleft, shorter than the calyx. Sta. 4, beardless, united 

 at base. Capsules globous, circumscissile. Seeds very minute. (T) Very 

 diminutive, with alternate Ivs. Fls. axillary, solitary, subsessile, white ? 



C. minimus L. St. ascending, branched; leaves subsessile, oval, obtuse, entire, the 

 lower opposite ; sep. linear-subulate. Wet, 111., and S. 1 6 r . April July. 

 / 



11. SAMOLUS, L. WATER PIMPERNEL. Calyx partly adherent, 5- 



cleft. Corolla salver-form, 5-cleft. Sta. 5, alternating with 5 scales (sterile 

 filaments). Caps, dehiscent at top by 5 valves, many-seeded. Herbs with 

 alternate Ivs. Flowers corymbous or racemous. May Aug. Figs. 22, 133. 



1 S. Valeraiidi L. (S. floribundus K.) St. simple or branched ; Ivs. obtuse, wedge- 



oval, the lower petiolate ; fls. in a raceme or panicle of racemes, pedicels with a mi 

 nute bract near the middle ; petals longer than the sepals. Wet gravels. 6 12'. 



2 S. ebracteAtus Kunth. Erect, leafy below ; Ivs. obovate-spatulate ; fls. racemed, 



ped. bractless ; cor. white, 3 times longer than the calyx (3"). Marshes. Fla., and W. 



ORDER LXXXII. PL ANT AGIN ACE J3. RIBWORTS. 



Herbs rarely shrubby, with radical leaves and the flowers in spikes on 

 scapes. Flowers Hegular, tetramerous. Stamens 4 2, alternate with the 

 1 ^oes of the corolla, and inserted on its tube. Anthers versatile, filaments 

 usually slender and exserted. Fruit a membranous pyxis, with 1, 2, or 

 many albuminous seeds. 



PL ANT A GO, L. PLANTAIN. RIBWORT. Sep. 4, membranous, per- 

 sistent. Cor. limb 4-toothed, spreading, persistent on the fruit. Stameng 

 4 (rarely 2), the long, slender filaments exserted, or in some of the fls. in 



