trichostema LAB I AT iE 547 



TEDCRIUM 



1 TRICHOSTEMA L. Sp. 598. 



Annual or perennial erect branching herbs or suffrutescent 

 plants with entire or slightly repand leaves and small or middle- 

 sized, mostly blue, flowers, paniculate or in axillary loose or 

 dense cymes. Calyx campanulate, very unequally or almost 

 equally 5-lobed. Corolla with narrow tube and more or less ob- 

 lique limb ; the somewhat similar lobes oblong and more or less 

 declined. Stamens 4, with long filaments that are spirally coiled 

 in the unopened limb, at length long-exserted, and divaricate or 

 divergent anther-cells. Ovary deeply 4-lobed. Amphitropous 

 ovules and seeds ascending, being attached below the middle. 



T. oblongum Benth. Lab. 659. Soft-villous throughout; stem simple 

 or branching from the base, 2-12 inches high from an annual root : leaves 

 oblong or|oval, with narrowed base, an inch or less long, membranaceous, 

 costate-veined : flowers in short glomerate cymules shorter than the leaves : 

 calyx nearly equally 5-parted, its lanceolate acuminate lobes about 3 lines 

 long, much longer than the tube: corolla blue, inconspicuous, its tube not 

 surpassing the calyx: filaments blue, long-exserted. In moist places, 

 western Washington to California. 



T. laxum Gray Proc. Am. Acad, vii, 387. Minutely soft-pubescent 

 annual : stem 6-14 inches high, simple or loosely branched : leaves rather 

 distant, lanceolate and oblong-lanceolate, acuminate, 1-2 inches long, rather 

 obscurely pinnately veined tapering at base, mostly into a slender petiole : 

 flowers in rather loose often forked long-peduncled cymules : pedicels a line 

 long: calyx campanulate, about 2 lines long, its equal ovate-triangular 

 acute lobes longer than the tube : corolla blue, 3-4 lines long, almost glab- 

 rous : stamens &-8 lines long. On gravelly bars along streams, southern 

 Oregon to California. 



T. lanceolatum Benth. 1. c. Cinereous-pubescent or villous annual : 

 stem 6-12 inches high, rather sparingly branched, very leafy : leaves much 

 longer than the internodes, ovate-lanceolate to lanceolate, narrowed below 

 to a very short petiole or sessile, acute and minutely cuspidate, strongly 

 nerved:' flowers in small sessile or very short- peduncled cymules much 

 shorter than the leaves : pedicels a line or two long : calyx campanulate, 

 about 2 lines long, its triangular-ovate acute lobes longer than the tube : 

 corolla blue, 6 lines long, the tube almost filiform, somewhat pubescent. 

 Common in dry ground, western Oregon to California. 



2 TEUCRIUM L. Sp. 562. 



Herbs or shrubs with dentate or entire leaves and rather small 

 pink, white or purplish flowers in terminal bracted spikes or 

 heads, or verticillate in the upper axils. Calyx campanulate. 10- 

 nerved, equally or unequally 5-toothed. Corolla-tube short, the 

 limb irregularly 5-lobed, the two short upper lobes oblong, erect 

 or declined, the lateral lobes more or less united with the upper 

 ones, the lower lobe larger, declined. Stamens 4, exserted betw- 

 een the two upper lobes of the corolla, the anterior pair longest. 

 Anther-cells divergent, confluent at base. Nutlets obovoid, ru- 

 gose-reticulated, with a broad introrse areola. 



T. occidentale Gray Syn. Fl. ii, 349. Villous or pubescent perennial: 

 stem erect rather stout, usually much branched, 1-3 feet high, the branches 

 ascending: leaves lanceolate or ovate-lanceolate, thin, acute or acuminate 



