618 MENTHACEAE 



acute; corolla white veined with purple, tube barely equaling the calyx, lobes sparsely villous, 

 the lower 6-8 mm. long. 



Moist sandy soil or among rocks, Sonoran Zones; a Lower California species occurring on the mainland 

 of the peninsula and on Cedros Island. An isolated colony has been discovered recently (F. IV. Peirson, Annie 

 M. Alexander) along the Colorado River in the Whipple Mountains, San Bernardino County, California. Type 

 locality: Cedros Island. April-May. 



2. TRICHOSTEMA [Gronov.] L. Sp. PI. 598. 1753. 



Annual or perennial strong-scented herbs or rarely shrubby, with oblong or linear, 

 entire or slightly repand leaves. Flowers usually blue or purple, paniculate, or in axil- 

 lary cymules. Calyx campanulate, very unequally or nearly equally 5-lobed. Corolla-tube 

 slender, exserted or included, limb oblique and deeply 5-cleft into oblong more or less 

 declined segments. Stamens 4, didynamous, coiled in the bud, ascending curved and long- 

 exserted in flower; anther-sacs divaricate, more or less confluent at base. Ovary deeply 

 4-lobed; style 2-cleft at the summit. Nutlet obovoid, reticulate. [Name Greek, meaning 

 hair and stamen, referring to the long, very slender filaments.] 



A genus of about 15 species, native of North America and principally on the Pacific Coast. Type species, 

 Trichostema dichotomum L. 



Annual herbs; margins of the leaves not revolute. 



Nodes of the stems distant, leaves therefore scattered, not apiculate at apex. 

 Calyx-lobes subulate, about twice as long as the tube. 



Leaves oblong to oval, obtuse or nearly so at both ends. 

 Leaves linear-lanceolate, tapering and acute at both ends. 

 Calyx-lobes triangular or lanceolate, about equaling the tube. 

 Corolla-tube about equaling or shorter than the calyx. 

 Calyx-lobes lanceolate; corolla barely 3 mm. long. 

 Calyx-lobes triangular-lanceolate; corolla 4-S mm. long. 

 Corolla-tube distinctly longer than the calyx. 



Stems glandular-villous and the calyx densely so; corolla-tube about 2 mm. longer than the 

 calyx; filaments exserted beyond the corolla-limb about 4 mm. 



5. T. rubisepalum. 



Stems glandular-pubescent; calyx rather sparingly glandular-pilose; corolla-tube exserted be- 

 yond the calyx about 5 mm.; filaments exserted beyond the corolla-limb 8-10 mm. 



6. T. taxum. 



Nodes of the stem approximate, the leaves therefore numerous, apiculate at apex. 



Leaves lanceolate, obtuse or acutish at base. 7. T. lanceolatum. 



Leaves ovate or round-ovate, rounded or subcordate at base. 8. T. ovatum. 



Shrubby plants; leaves linear or linear-lanceolate, with revolute margins. 



Inflorescence densely clothed with usually purple wool; cymules dense, simulating an interrupted spike; 



calyx about 8 mm. long, lobes lanceolate; filaments exserted 25-30 mm. 9. T. lanatum. 

 Inflorescence moderately clothed with tomentum or short wool, usually cinereous; cymules open with the 

 peduncles and pedicels quite evident; calyx about 5 mm. long, the lobes triangular; filaments ex- 

 serted 10-15 mm. 10. T. Parishii. 



1. Trichostema oblongum Benth. Mountain Blue-curls. Fig. 4355. 



Trichostema oblongum Benth. Lab. Gen. & Sp. 659. 1835. 



Annual, stems slender, simple or sparingly branched, 5-30 cm. high, soft-villous throughout 

 and more or less glandular above. Leaves oblong to oval or sometimes oblong-lanceolate, 2-3 cm. 

 long, obtuse, thin, veins not costate ; cymules many-flowered, on very short peduncles, villous ; 

 fruiting calyx 3-4 mm. long, the lobes lanceolate-subulate, about thrice as long as the tube; 

 corolla 5-6 mm. long, the tube but slightly exserted beyond the calyx, the lobes villous without. 



Moist ground, Transition and Canadian Zones; Spokane County, Washington, and adjacent Idaho, south 

 to the southern Sierra Nevada and North Coast Ranges, California. Type locality: Fort Vancouver, Washing- 

 ton. June-Sept. 



2. Trichostema austromontanum H. Lewis. San Jacinto Blue-curls. Fig. 4356. 



Trichostema austromontanum H. Lewis, Brittonia 5: 284. 1945. 



Annual, the stems erect, 1-3 dm. high, with rather distant nodes, branches appearing in pairs 

 from all but the upper nodes, rather short-tomentose and more or less glandular with inter- 

 spersed villous hairs. Leaves linear-lanceolate to oblong-lanceolate, narrowed at base to a short 

 petiole, acute at apex, 1.5-3.5 cm. long, 2-8 mm. wide, tomentose ; cymules small, several- 

 flowered, mostly simple ; calyx-lobes lanceolate-subulate, longer than the tube ; corolla 3 mm. 

 long, the tube equaling the calyx ; stamens 5-6 mm. long ; nutlets rather densely puberulent. 



Mountain meadows, Arid Transition Zone; mountains of southern California, from the San Gabriel Ranges 

 to the Cuyamaca Mountains; also an isolated colony on the eastern base of the Sierra Nevada (Fern Creek near 

 Gull Lake, Mono County). Type locality: Lake Hemet, Riverside County, California. June-Oct. 



Trichostema austromontanum subsp. compactum H. Lewis, Brittonia 5: 285. 1945. Plant low, compact, 

 the leaves smaller; nutlets glabrous or very sparingly puberulent. Hidden Lake, San Jacinto Mountains, 

 southern California. 



3. Trichostema micranthum A. Gray. Small-flowered Blue-curls. Fig. 4357. 



Trichostema micranthum A. Gray, Syn. Fl. N. Amer. 2^: 348. 1878. 



Stems simple or with a few branches, 10-25 cm. high, cinereous-pubescent or puberulent. 



