k 



HYPliKlCACK^t. (sT. JOIIN's-WORT I'AMILY.) 85 



naked ; sfjKils oblong ; jyods ovate-conical, pointed, almost 3<(-lled ; seeds slender cy- 

 liiiilrioil, iiiiiiutely jiitted. — Low j^iouiuls, IViiiisylvania, Vir^nnia, anil soiitli- 

 waiil. July. 



7. H. SphserOC^rpon, Michx. 8U'in.s mustly hiiiiijle, lierbaccous, with 

 a somewhat woody base, angled with 4 very narrow salient lines (l°-2° hiyh) ; 

 leaves olilonij-Uneur, greener above and narrower than in the preceding; the 

 naked eynie similar; sepals ovate ; pods depressedf/lobiilar or ovoid-conical, strictly 

 l-cellid; seeds oblong, rough-pitted. — Koeky banks of the Ohio and its tribu- 

 taries, S. W. Dliio to Illinois and southward. July -Sept. — Flowers small. 



8. H. ellipticum, Hook. Stem simple, herbaceous ( 1° high), obscurely 

 4-angled ; leaves sjimidini/, (lliptind-o'jlonr/, obtuse, thin ; cyme nearly naked, 

 rather fcw-tlowered ; sepals oblontj ; jiods ovoid, very obtuse, purj)le, I -celled. — 

 Wet places, New England and I'enn.sylvania to Lake Superior and northward. 

 July, Aug. — Petals light yellow, 3" long. 



9. H. angulbsura, Michx. Stem slender, strict, simple, sharjjly 4- 

 angled, herbaceous (l°-2° high); leaves ascendiny, opaque, ovate or oblong- 

 lanceolate, acute (^'-\' long), closely sessile by a broad base; cyme com- 

 pound, naked, the scattered flowers raccmo.se on its ascending branches ; sepals 

 herbaceous, ei'ect, enclosing the ovoid 1 -celled pod ; styles 3, separate. — Wet i)iuc 

 barrens of New Jersey and southward. July -Sept. — I'etals cojipcr-yellow^, 

 4" -5" long, furnished with a tooth on one side. 



§ 3. Stamens very numerous, in 3 or 5 clusters : styles 3 separate and nsuafly diverg- 

 ing : pod 3-cellfd : calyx erect : petals and anthers with black dots. 



10. H. i'ERFOK.\TtJi, L. (Common St. Joiin's-wort.) Stem much 

 branched and corymbcd, somewhat 2-edgcd (producing runners from the 

 base) ; leaves elliptical-oblong or linear-oblong, with pellucid dots; petals (deep 

 yellow) twice the length of the lanceolate acute sepals; flowers numerous, in 

 open Iciifv cymes. — Fields, &c. June - Sept. — Too well know^n as a pernicious 

 weed, which it is difficult to extirpate. Juice very acrid. (Nat. from Eu.) 



11. H. COrymbosum, Muhl. Conspicuously marked with both black 

 and pellucid dots : stem terete, sparingly branched ; leaves oblong, the base 

 either obtuse or somewhat clasping; flowers crowded (small) ; petals pale yellow, 

 much longer than the oblong sepals, styles not longer than the pod. — Damp 

 places; common. July -Sept. — Leaves larger and flowers much smaller than 

 in the last : ])Ctals 2" -3" long, marked wilh black lines as well as dots. — Too 

 near IL maculatum, TT'i'(/<., of the South, which has more elasi)ing leaves and 

 very long and slender styles. 



12. H. grav^olens, Buckley. Like the last, but with larger leaves and 

 fewer much lanjir bright yellow flowers, lanceolate acute sepals, and long erect 

 styles ; common in the mountains of N. Carolina, doubtless also in S. Virginisu 

 §4. Stamens 5 -1-2, distinct or in 3 dusters: pod (brown purple) \-celled, with 3 



strictly parietal plaei-ntai : styles short, distinct ; petals oblong or linear : sejials 

 narrow, erect : slender annuals, with 4 angular branches ; flowering all summer. 



13. H. mtltilum, L. Stem flaccid, widely branching (6'- 10' high) ; 

 leaves ovate, or otiloiig, obtuse, parOy dasping, b-neived ; cymes leafy; }wds orat>- 

 conical, rather longer than the calyx. (H. parviflorum, Muhl.) — Low grounds. 

 evervwhere. — Flowers 2" broad. 



