750 ' LAMIACEAE 



Calyx-teeth about equal in length; bracts spreading or reflexed, hispid-cihate. 



1. H, hispida. 



Calyx-teeth of the lower lip much longer than those of the upper; bracts mostly erect. 



cinereous-hispidulous. 

 Corolla 10-12 mm. long, more than half longer than the calyx. 2. II. camporum. 



Corolla 6-8 mm. long, slightly exceeding the calyx. 



Floral leaves longer than the subtended calyces; plant 1.5-4 dm. high. 



3. H. sancta. 



Floral leaves scarcely exceeding the subtended calyces; plant 1-1.5 dm. high. 

 Leaf-blades oval or elhptic, distinctly petioled. 4. H. thymotdes. 



Blades of the floral leaves oblong to linear. 5. II. ovata. 



1. H. hispida Pursh. Annual; stem 1-2 dm. high, hispidulous; leaves 

 linear, entire, thickish, hispid-ciliate; upper calyx-teeth subulate, the lower more 

 aristiform, equalling the bluish corolla, 6 mm. long. Sandy soil: Sask. — Wis. 

 Ky. — Colo. — ^Alta. Plain, My-Jl. 



2. H. camporum Rydb. Perennial, with a slender taproot; stems branched 

 at the base, decumbent or ascending, finely, puberulent; leaves spreading, linear- 

 lanceolate, lanceolate, or oblong, 1-2 cm. long, grayish-puberulent, subsessile; 

 calyx 7-8 mm. long, somewhat saccate below; teeth subulate, the lower 2 mm., 

 the upper 1 mm. long; corolla puberulent, with an ample limb. H. longijiora 

 Rydb., not Briq. Canons: S.D. — Kans. Plain, 



3. H. sancta Small. Annual or perennial; stem erect, branched, cinereous- 

 pubcrulent; leaf -blades oval, oblong, or linear-oblong, 1-1.5 cm, long, entire, 

 slightly revolute, short-petioled; calyx 5-G mm. long, hispidulous; tube some- 

 what saccate; lobes subidate, the lower about twice as long as the upi)er; corolla 

 puberulent. Dry plains: Tex. — Colo. — N.M. Plain — Subtnont. Ap-Jl. 



4. H. thymoides A. Gray. Perennial, with a taproot; stem branched at 

 the base, finely puberulent; leaf-blades ovate or elliptic, 6-10 mm. long, ^hort- 

 petioled, canescent-puberulent; calyx about 5 mm. long, hispidulous; teeui 

 subulate, the lower slightly longer than the upper; corolla 6-7 mm. long. -W^ 

 nana Rydb., in part. Mountain sides: N.M. — Colo.— Utah— Ariz. Son, 

 Submont. Ap. 



6. H. ovata A. Nels. Perennial, with a taproot; stem branched at the base, 

 divaricate, puberulent, 1-2 dm, high; blades of lower leaves oval or ^^Y>!i'' 

 7-15 mm. long; floral leaves Hnear; caljoc about 5 mm. long; lower teeth a little 

 longer than the upper; corolla barely exceeding the calyx. H. Drummonan 

 Coult., in part. H, 7iana Rydb., in part. Hills: Mont.— Colo.— Utah. ^uO- 

 mont, Je-Jl. 



23. CLINOPODIUM L. Basil. 



Annual or perennial herbs or rarely shrubs. Leaves opposite, ^j^*^^^,^! 

 toothed, narrow or broad. Flowers in ours in dense axillary clusters subtenaea 

 by linear-filiform bracts. Calyx 13-ribbed, often swollen at the base; ^PP^^ ^{P 

 with 3 short lobes; lower Up with 2 longer lobes. Corolla 2-lipped, abruptly 

 dilated at the throat; upper lip erect; lower hp spreading, 3-lobed. Stamens , 

 all anther-bearing; anther 2-ceIled, awnless. Nutlets smooth. 



1, C. vulgare L. Perennial, with a rootstock; stem 1-5 dm. high, simple or 

 nearly so, sparingly hairy; leaf -blades oval or ovate, 1-4 cm. long, obtuse, unau- 

 late or crenate; calyx 8-9 mm. long, villous-hirsute, ribbed; lobes stibulate-^is- 

 tate; corolla wliite or purple, 10-12 mm. long. Thicketri and waste places: JN.o. 

 — N.C. — Colo.— -Man.; nat. or adv. from Eu. Plain — Mont. Je-Au. 



24. MADRONELLA Greene. False Horse-mint, Western 



Pennyroyal, Mustang Mint. 



Aromatic caulescent perennials. Leaves mostly short-petioled, *^PP9,^ .®' 

 entire or dentate. Flowers perfect, in dense terminal or axillary verticUiai 

 heads, subtended by broad membranous or colored bracts. Calyx tubular, na - 

 row, 15-nerv'ed, with 5 equal teeth. Corolla 2-lipped; upper lip e"^"'*^' PJ' 

 linear or oblong; lower lip 3-cleft, with linear divisions. Stamens 4, ^^^" j ' 

 bearing, unequal, exserted; anther-sacs 2, divergent. [Monardella Bentn., 

 part.] 



