354 LABIATE. Hyssopus. 



tate : flowers in peduncled loose cymes, rudiments of the upper pair of stamens generally 

 apparent. — Spec. ed. 2,i. 30; Bart. Med. Bot. t. 42; Lodd. Bot. Cab. t. 1206; Sweet, Brit. 

 FI. Gard. t. 243 ; Torr. PI. N. Y. t. 76. Satureia origanoides, L., ed. 1. — Dry soil, S. New 

 York and Ohio to Georgia. 



12. HYSSOPUS, Tourn. Hyssop. (The ancient name, from a Hebrew 

 word.) Only one species. 



H. OFFICINALIS, L. Perennial herb, with somewhat woody base, virgate branches, lanceo- 

 late or linear entire leaves, and blue-purple flowers in small spiked clusters, in summer. — 

 Sparingly on roadsides eastward, and in California, escaped from gardens. (Nat. from 

 Eu. and Asia.) 



13. PYClSrANTHEMUM, Michx. Mountain Mint or Basil. (From 

 Ilvxvog, dense, avdsfiov, blossom : glomerate inflorescence.) — Perennial erect 

 herbs (all N. American, and all but one eastern), pleasantly pungent-aromatic, 

 branching above ; with capitate-verticillastrate glomerules or dense cymes (com- 

 monly multibracteate) in the upper axils, or mainly cymosely terminal ; flowers 

 small, whitish or purplish, often purple-dotted, in summer. — Michx. Fl. ii. 7, with 

 Brachystemum, 1. c. 5 ; Gray in Am. Jour. Sci. xlii. 44. 



§ 1. Flower-clusters naked in a terminal corymbose cyme, small, rather dense ; 

 the proper bracts minute and loose : calyx short-tubular ; the teeth equal : leaves 

 sessile and small. 



- P. nudum, Nutt. Nearly glabrous ; stem strict, 2 feet high : leaves oval, nearly entire, 

 less than inch long, shorter than the internodes : calyx-teeth triangular, villous. — Gen. ii. 

 34. — Low pine barrens, N. Carolina T to Florida, Alabama, &c. 



§ 2. Flowers densely verticillastrate-cyraose or glomerate, usually conspicuously 

 much bracted : calyx oblong or short-tubular. (Many of the species difficult of 

 discrimination, perhaps on account of hybridizing.) 



* Bracts and equal calyx-teeth aristate-tipped, rigid, naked, equalling the corolla : leaves slightly 

 petioled, rather rigid. 



' P. aristatum, Michx. Minutely soft-puberulent, mostly canescent : leaves ovate- and 



lanceolate-oblong, sparingly denticulate ; flower-clusters dense or capitate, terminal. — Fl. 



ii. 8, t. 33. P. verticUlatum, Pursh, not Michx. P. setosum, Nutt. in Jour. Acad. Phi lad. 



vii. 100. Origanum incanum, Walt. — Pine barrens. New Jersey to Florida and Louisiana. 

 Var. hyssopifolium, Gray, 1. c. {P. hyssopifoliam, Benth.) ; leaves narrowly 



oblong or almost linear, nearly entire, obtuse. — Virginia to Florida. 



* * Bracts and equal (or later species nearly equal) and similar calyx-teeth not arislate. 



^— Leaves hnear or lanceolate, nearly sessile, entire, mostly glabrous, very numerous throughout 

 the stems and copious branchlels ; 'capitate glomerules small and numerous, rtcUMlv fastigiate- 

 cymose, copiously imbricaied with short apprcssed rigid and subulate-pointed or a'cute bracts, 

 which do iiot exceed the equally 5-toothed calyx : lip.5 of the corolla very short. {Brachystemum 

 Virtjinicuin, ilichx. ) 



P. linifolium, Pursh. Glabrous up to the canescent inflorescence, 2 feet high, slender : 

 leaves linear, somewhat 3-nerved ; bracts subulate or cuspidate-tipped from a. broad base : 

 calyx-teeth lanceolate-subulate, rigid-pointed. — Fl. ii. 409. Satureia Virgiiiiana, L., as to 

 syn. Pluk. KaJlia capitata, Mccnch, Meth. 408. Brachi/stemum liiiijhiium, Willd. Enum. 023. 

 Pi/cmmtliemum tenuifolium, Schrad. Hort. Gott. 10, t. 4. — Dry ground, Massachusetts to 

 Illinois, Florida, and Texas. 



P. lanceolatum, Pursh, 1. c. Stem stouter and somewhat pubescent : inflorescence 

 villous-cancscent ; leaves lanceolate or almost linear, nervose-veined, obtuse at base : 

 bracts ovate or lanceolate : calyx-teeth ovate-deltoid, merely acute — SnUireia Virgiiiiann, 

 Herm. Parad. t. 218 ; L, Spec. ii. 567. Thymus Virginiais, L. Mant. 400. T. lanceolalus, 

 Poir. Suppl. V. 305. iVepcta Virginica, Willd. Spec. iii. 56. Brachystemum lanceolatum, Willd. 

 Enum. 023. Pycnanthemum Virginicum, Pers. Syn. ii. 128. —Dry ground, Mass. and Canadu 

 to Nebraska and Georgia. 



