354 LABIATE. Hyssopu.^. 



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. 1205; Sweet, Brit, 

 n. Card. t. 243; Terr. Fl. 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. PYCNANTHEMUM, Michx. Mountain Mint or Basil. (From 

 Tlvxvog, dense, avde^ov, 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, w'hitish 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 ■? to Florida, Alabama, &c. 



§ 2. Flowers densely verticillastrate-cymose 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 sof t-puberulent, mostly canescent : leaves ovate- and 



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



ii. 8, t. 33. P. verticiUatum, Pursh, not Michx. P. setosum, Nutt. in Jour. Acad. Philad. 



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

 Var. hyssopifolium, Gray, 1- c. (P. hyssopifolium, 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 linear or lanceolate, nearly sessile, entire, mostly glabrous, very numerous throughout 

 the stems and copious braiichiets : "capitate glomerules small and numerous, densely fastigiate- 

 cvmose, copiously imbricaied with short appressed rigid and subulate-pointed or a"cute bracts, 

 which do not exceed the equally 5-toothed calyx : lips of the corolla very short. i^Brachystemuvi 

 Vir<jmlcuin, Michx. ) 

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



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



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



syn. Pluk. Kodlia capilata, Moench, Meth. 408. Brachystemum linifoUam, Willd. Enum. 623. 



Pycnanthemum temiifolium, Schrad. Hort. Gott. 10, t. 4. — Dry ground, Massachusetts to 



Elinois, Florida, and Texas. 

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



viilous-canescent : leaves lanceolate or almost linear, nervose-veined, obtuse at base: 



bracts ovate or lanceolate : calyx-teeth ovate-deltoid, merely acute — Satureia Virginiana, 



Herm. Parad. t. 218 ; L. Spec. ii. 567. Thymus Virginicus, L. Mant. 409. T. lanceolatus, 



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



Enum. 623. Pycnanthemum Virginicum, Pers. Syn. ii. 128. — Dry ground, Mass. and Canada 



to Nebraska .and Georgia. 



