HYPERTCINE^E. 61 



*** Stamens numerous, indefinite. Styles mostly 3. Flowers yellow. 



4. H. angulosum Mich. : stem herbaceous, square, erect ; leaves dis- 

 tant, elongated, ovate, subclasping, sinuate on the margin, acute, not 

 punctate ; flowers axillary, solitary, in a dichotomous panicle ; calyx 

 lanceolate, acute, somewhat keeled. H. denticulatum Walt. 



HAB. . Cedar swamps. N. J. to Car. June, July. It. Stem 

 12 18 inches high, branched towards the summit. Floicers 

 scattered in the panicle and alternate, orange-coloured. Styles 

 3, often united. 



5. H. cistifolium Lam, : stem angular ; leaves ovate-oblong, some- 

 what acute, black-punctate beneath, subclasping, revolute on the mar- 

 gin ; flowers in dichotomous corymbs ; calyx ovate ; styles united. 

 H. adpressum Bart. ? 



HAB. Western part of N. Y. Dr. Asa Gray. July. If. 



6. H. punctatum Linn. : stem terete, black- punctate ; leaves ovate- 

 lanceolate, obtuse, subclasping ; flowers in dense corymbs ; calyx lan- 

 ceolate, acute. H. corymbosum WiUd. Pursh. H. maculatum Walt. 



HAB. Shady woods. Can. to Car. June. 2J..Stem 2 feet 

 high. Flowers in a compact panicle or corymb. Styles 3, longer 

 than the stamens. Whole plant, except the filaments and styles, 

 spotted with black dots. 



7. H. perforatum Linn. : stem ancipital ; leaves obtuse, ovate-ellip- 

 tic, and with the lanceolate calyx pellucid-punctate ; flowers pani- 

 cled ; anthers with black punctures ; styles diverging. 



HAB. Fields. N. S. June Aug. U-Stem a foot high, 

 branched. Floioers yellow. A pernicious weed, producing, ac- 

 cording to Dr. Darlington, troublesome sores upon horses and 

 horned cattle, where it comes in contact with them. It would 

 seem that the dew which collects on the plant, becomes active 

 in this way. Fl. Cestrica. Introduced. St. John's Wort. 



8. H. parviflorum Willd. : 'stem erect, much branched, smooth, 

 square ; leaves ovate, subcordate, obtuse, sessile, obscurely 5-nerved, 

 pellucid-punctate j flowers in a dichotomous corymb ; calyx linear- 

 lanceolate, longer than the petals. H. quinquenervium Walt. Mich. 



HAB. Overflowed grounds. Throughout Can. and the U. S. 

 June Aug. If. Stem 6 12 inches high. Flowers very small, 

 yellow, solitary in the divisions of the stems. 



9. H. canadense Linn. : stem erect and straight, .4- winged ; leaves 

 linear, attenuate at the base, rather obtuse ; panicle elongated, dicho- 

 tomous ; calyx lanceolate ; styles very short ; capsule long, conical, 

 coloured. 



HAB. Gravelly soil. Can. to Car. June Aug. 0. Stem 612 

 inches high. Flowers small, yellow. Capsule much longer than 

 the calyx and of a reddish colour, by which, together with its 

 linear leaves, it can be readily distinguished from the preceding. 



10. JFf. sarathra Mich. : erect, much branched above; branches seta- 

 ceous ; leaves minute, subulate, appressed ; flowers terminal, subsoil- 



6 



