CHAP. XXI. /TYPERICA^CE^. TZ^YPE'RICUM. 401 



§ ii. Petrol aria Chois. 



Identification. Chois. Prod. Hyp., p. 44., Dec. Prod., 1. p. 546.; Don's Mill., 1. p. G03. 

 Derivation. From perforatus, perforated ; because the leaves are full of pellucid dots, which gives 

 them the appearance of being perforated. 



Sect. Char. Calyx of 5 equal sepals, toothed in some with glandular teeth, 

 but entire in others, connected at the base. Stamens numerous, free or 

 disposed in 5 sets. Styles commonly 3. Herbs or undershrubs. Flowers 

 axillary, or in terminal panicled corymbs. Leaves rarely linear. (Don's Mill., 

 i. p. 603.) Undershrubs, from 1 ft. to 3 ft. in height. ' 



A. Sepals entire. 



• 15. H. proli'ficlm L. The prolific St. John's Wort. 



Identification. Lin. Mant.. 106. ; Don's Mill., 1. p. 605. 



Synonymes. H. folii.sum Jacq , Hort. Sclionbi-., 3. p. 27. ; H. Ka\miunum Du Roi, Harbk., 1. p. 310. 



Engravings. Wats. Dend. Brit., t. 88. ; J.icq. Hort. Schiinb., t. 299. 



Spec. Char., c^t. Stem round. Branches angular. Leaves linear-lanceolate, 

 with revolute edges, full of pellucid dots. Corymbs few-flowered. Sepals 

 ovate-lanceolate, stamens very numerous. Styles usually connected 

 together. {Don's Mill., i. p. COo.) A sub-evergreen shrub, from Virginia and 

 Canada, introduced in 1758, and producing its yellow flowers from June till 

 August. Height 4 ft. Frequent in gardens, and forming a dense leafy 

 bush, covered with flowers great part of the summer, and with seed-pods in 

 the autumn. American seeds, in London, 6d. a packet; and plants, in Lon- 

 don, 9(1. each; and at Bollwyller, 50 cents each. 



«. 16. H. heterophy'lmm Vent. The various-leaved St. John's Wort. , 



Identification. Vent. Hort. Cels, t. 68. ; Don's Mill., 1. p. 607. 



Engraving. Vent. Hort. Cels, t. 68. 



Spec. Char., Sfc. Stem sufTruticose, round. Leaves linear.lanceolate, full of pellucid dots; axillary ones 

 crowded, imbricate, very short, blunt. Sepals acute, somewhat unequal. {Don's Mill., i. p. 607.) 

 A low sub-evergreen undershrub, from Persia, in 1712, and producing its yellow tiowers in July and 

 August. Height 2ft. It requires some protection during winter. 



n. 17. H. .egvpti'acum L. The Egyptian St. John's Wort. 



Identification. Lin. Sp., 1103. ; Don's Mill , 1. p. 607. 



Engravings. L'.n. Aranen., 8. t. S. f. 3. ; Ker Bot. Keg., t. 196. 



Spec. Char., f(C. Stem round. Leaves small, ovate, crowded, without dots. Flowers few, almost 

 sessile. Sepals lanceolate, acute. Styles small, diverging. (D(m's Mill., i. p. 607.) A sub-evergreen 

 undershrub, with glaucous leaves and small flowers ; introduced from Egvpt in 1787, and producing 

 its yellow flowers in June and July. Height 2 ft. It requires protection during winter. 



«. 18. H. galioi'des Lam. The Ga\mm-\ikc-/eaved St. John's Wort. 



Identification. Lam. Diet., 4. p. 160. ; Don's Mill, 1. p.&i9. 



Spec. Char. Stem sufTruticose, round, straight. Leaves linear-lanceolate, tapering to the base, 

 broadest at the apex, acute, with revnlute dotted margins. Sepals linear, acute, reflcxed after 

 flowering. Styles at first connected, but at length free. Capsules conical, very acute (Don's Mill., i. 

 p. ecii.^ A sub.cvergreen undershrub, native of North .America, from New Jersey to ( arolina, in 

 sandy moist places near rivulets ; producing its yellow flowers from July to September. Height 2 ft. 



«. 19. H. AXILLA^ RE Lam. The axillary-^owei-ed St. John's Wort. 



Identification. Lam. Diet, 4. p. 160. ; Don's Mill., 1. p. 609. 



Synonymes. H. fasciculMum IVilld. Spec, 3. p. 14.")2., exclusive of the synonymes of Michx., Pursh. 

 Fl. Amer. Sept., 2. p. 376. ; //. Curis J(««. Ft. Carol., 190. 



Spec. Char., <^-c. Stem shrubby, round, diffuse. Leaves lanceolate-linear, nar- 

 rowed at the base, with revolute margins. Sepals rather unequal. Styles, 

 at first joined, but afterwards free. (Don's Mil/., i. p. 609.") A sub-evergreen 

 undershrub, native of the pine woods of Georgia and Florida; producing its 

 yellow flowers in July. Height 2 ft. 



F F 2 



