290 LABIATE. 



* * Flowers very small; upper stamens sterile. 



3. P. serpylloides (Torr.), Gray. Slender, almost diffuse, the branches 

 36 in. long: leaves obovate-oval or spatulate, 34 lines long, most of 

 the lower distant with but few flowers in the axils, the upper approx- 

 imate and the verticillasters dense and spicate-crowded: calyx hirsute, 

 its lobes unequal but all much longer than the tube, the longer fully 

 equalling the very small blue corolla: sterile filaments with capitellate 

 rudiments of anthers: style with few and coarse hairs. Plentiful in 

 moist shades; Oakland Hills, etc. 



9. ACAXTHOMINTHA, A. Gray. General aspect of the preceding, 

 and floral structure similar, but flowers less crowded; each verticillaster 

 subtended not only by its leaves, but also by a pair of almost stipule-like 

 coriaceous callous- and prickly-margined broad bracts. 



1. A. lauceolata, Curran. Stoutish, ^ 1 ft. high, pubescent, oily 

 and ill-scented: leaves oblanceolate or oblong, sparingly spinulose- 

 dentate: teeth of bracts and calyx long-aristate : middle tooth of upper 

 calyx-lip erect, the lateral bent forward in fruit; lower lip 2-parted, its 

 segments lanceolate and awns short: upper lip of corolla somewhat 

 falcate-incurved, cleft at apex; lower with oblong entire lobes, the 

 middle one longer and narrower: style sparsely pilose. Mountains near 

 Niles; also on Mt. Hamilton and southward to Monterey Co. June Aug. 



10. SPHACELE, Benth. Strong-scented shrubs, with ample leaves; 

 the floral reduced in size, and the large flowers solitary in their axils. 

 Calyx campanulate, deeply and subequally 5-toothed. Corolla with 

 broad tube, and 4 short spreading lobes; the 5th and lowest one much 

 longer, laid in a fold and erect. Stamens 4, distant ; anther-cells diverging. 



1. S. calycina, Benth. Bushy-branching. 25 ft. high, tomentulose- 

 villous or glabrate : branches with ample thinnish and soft rugose ovate- 

 oblong crenate leaves 2 4 in. long, short-petiolate; the uppermost and 

 floral sessile: calyx-lobes triangular-lanceolate, little surpassed by the 

 white or merely flesh-tinted corolla: anthers short. Bather dry hills of 

 the coast ranges. June Aug. 



11. SAL VIA, Linn. Aromatic herbs and shrubs of various aspect; 

 inflorescence in ours densely verticillastrate and interrupted. Calyx 

 bilabiate, with upper lip 3-toothed or entire; lower 2-cleft. Corolla 

 deeply bilabiate; upper lip erect; lower spreading or drooping, its 

 middle lobe commonly large, notched or obcordate. Stamens 2, in the 

 throat of the corolla; filaments short, the long curved connective appear- 

 ing like a fork to the proper filament, its posterior portion ascending 

 and bearing a single anther-cell, its opposite arm bearing a smaller or 

 merely rudimentary anther-cell, or this arm of the connective itself 

 almost obsolete. 



