432 LABIATAE 



not to be had in this perennial group. It is possible, however, to recognize certain groupings con- 

 sidered as species into which the great majority of individuals fall. The occurrence of occasional 

 transitional forms need not detract from the working value of such groupings. A few narrow 

 endemic forms of the perennial group such as Monardella cinerea, M. viridis and M. purpurea, 

 are held distinct from the more widely distributed species. It should be noted, however, that 

 these are represented by few collections and that more extensive field knowledge might reveal the 

 lack of constant characters. 



A. Flowers rather loose in the head; corolla-tube much longer than Umb, exserted; calyx more 



than % inch long; low diffuse perennials; inner mountains of S. Cal. 



Corolla scarlet or yellowish, 1 to 1% inches long, the tube elongate-funnelform 1. If. macrantha. 



Corolla white to pale rose, % to 1% inches long, the tube tiliform-cylindric - 2. il. nana. 



B. Flowers typically densely capitate; corolla-tube but little longer than the limb; calyx less 



than ^2 inch long; annuals or perennials. 



1. Perennials, often from a woody root-crown. 



Leaves rather thin, often broad, entire or sometimes serrate, not revolute-margined or only slightly 

 so in no. 4. 

 Plants dwarf (commonly only 1 to 4 inches high), caespitose, ashy-grey; leaves 2 to 4 lines 



long; San Gabriel Mts -...3. M. cinerea. 



Plants taller ; pubescence various ; leaves generally more than 5 lines long. 

 Bracts like the leaves in texture, green or sometimes purplish. 



Bracts translucent in the spaces between the veins ; leaf -blades entire ; Napa Range 



and Mayacamas IJange 4. If. viridis. 



Bracts entirely opaque; leaf -blades either toothed or entire; Coast Eanges and n. 



Sierra Nevada foothills 5. il. rillosa. 



Bracts, at least the inner, membranous, usually whitish or purplish ; leaf -blades entire. 

 Leaf -blades oblong-lanceolate to ovate, pubescent or usually minutely puberulent ; 

 stems rarely purple ; plants mostly herbaceous ; higher Sierra Nevada and 



higher inner North Coast Eanges 6. M. odoratissima. 



Leaf -blades linear to oblong. 



Leaves strictly glabrous; stems purple; plants herbaceous; Del Norte Co 



7. il. purpurea. 

 Leaves as if glabrous and glaucous, but microscopically and finely gray-pubes- 

 cent; woody-based or shrub-like plants; S. Cal., especially ranges 



bordering the deserts, and Inyo Co 8. M.. Unoides. 



Leaves thick, revolute-margined ; rare. 



Leaves entire, not fascicled ; montane chaparral ; cismontane S. Cal 9. M. iiypoleuca. 



Leaves undulate-lobed, fascicled at the nodes; sand dunes on Santa Barbara coast line 



10. M. crispa. 



2. Annuals from simple fibrous roots. 



Bracts not at all white (except no. 11) ; calyx-teeth not white-tipped ; corolla purple, rarely white. 



Leaves strongly undulate-margined ; coast line 11. M. undulata. 



Leaves plane, entire. 



Bracts not at all scarious. 



Bracts sparingly puberulent, pinnately veined ; widely distributed-12. M. lanceolata. 

 Bracts villous, the veins parallel or only partly pinnate; San Bernardino Valley 



13. If. pringlei. 

 Bracts scarious between the veins. 



Bracts with numerous narrow veins, the scarious interspaces not conspicuous ; leaves 

 conduplicate; inner ranges from e. Alameda Co. to n. Ventura Co 



14. M. ireweri. 

 Bracts with few prominent pinnate veins and conspicuous scarious interspaces ; 



leaves plane ; South Coast Eanges back of the coast 15. M. douglasii. 



Bracts with white margins or tips or wholly white; cah-x teeth Avhite-tipped ; corolla white. 

 Bracts partly white ; calyx-teeth triangular-acute, not divergent ; stamens exserted. 



Bracts merely acute, narrowly white-margined ; calyx 13-nerved, the teeth hirsute outside, 



in fruit nearly concealed; Sierra Nevada foothills 16. If. candicans. 



Bracts abruptly acuminate, with conspicuous white tips ; calyx 15-nervod, the teeth merely 

 scrobiculate or slightly if at all hirsute outside; s. Sierra Nevada in Kern Co. 



and w. Mohave Desert 17. il. exilis. 



Bracts wholly white; calyx-teeth subulate, divergent; stamens included; e. side San Joaquin 

 Valley near Merced and Tuolumne rivers 18. M. leucocephala. 



