MINT FAMILY. 361 



Style Bomewhal exserted, in some (perhaps all) species flattened above and 

 always bearded. (Greek pogon, beard, and gune, female, on account of the 

 hairy style.) 



All 4 stamens anther-bearing; corolla large, much longer than calyx; bracts conspicuously 

 ciliate with white hairs. 



Bracts linear, acute I. P. douglasii. 



Bracts obtuse . . . .2. P. parviflora. 



Lower pair of stamens anther-bearing, the upper with mere rudiments of anthers or 

 none; corolla about equaling (scarcely longer than) calyx; bracts sparsely hairy. 



Plants very slender, diffuse 3. P. scrpylloidcs. 



Plants stoutish, erect 4. P. ziziphoroides. 



1. P. douglasii Benth. Commonly low (4 to 6 in. high) and branched 

 from the base, ofttimes simple and as much as 2 ft. high; leaves oblanceolate 

 or obovate and narrowed to a petiole, % to 1*4 i Q - long; whorls forming a dense 

 terminal spike, often with a single accessory whorl in the adjacent axil below, 

 or sometimes several of the lower axils with flowers; bracts cuspidate, the 

 margin ciliate with white hairs; lower divisions of calyx twice longer than 

 tube; corolla blue, the palate white, dotted with purple, bristly, 7 to 9 lines 

 long; stigmas subequal; nutlets smooth, often mottled, minutely hispid at the 

 apex. 



Low summer-dry fields that have been overflowed in the winter season: Coast 

 Range valleys from San Luis Obispo, Pajaro and Mt. Diablo to Napa Co., 

 Santa Rosa. L T kiah, Lake Co. and eastward to the Sierra Nevada foothills. 

 Often coloring large areas in May and June. Style flattened above and hirsute- 

 ciliate on the margins as also in P. ziziphoroides. 



2. P. parviflora Benth. More slender than the preceding; bracts mostly 

 obtuse; calyx-teeth rather broad, the lower barely longer than the tube; corolla 

 scarcely \'-> in. long. 



About San Francisco Bay. 



3. P. serpylloides Gray. Stems many from the base, very slender, diffuse; 

 leaves obovate-oval or spatulate, petioled, 2 to 4 lines long; whorls except the 

 terminal ones distinct, the lower with few or even solitary flowers; bracts sparse- 

 ly hairy; calyx-lobes all longer than the tube, equaling the violet or bluish 

 corolla; corolla 1V> to 2 lines long, short-pubescent outside; sterile stamens 

 with rudiments of anthers or with none ; style bearded above with a few coarse 

 hairs; stigmas very unequal. 



Monterey to Humboldt Co., common; Sierra Nevada; Southern California. 

 May. 



4. P. ziziphoroides Benth. Stems short, commonly several from the base, 

 4 to 6 in. high; leaves obovate; bracts ciliate with white bristly hairs; whorls 

 below distinct, with long internodes, above forming a short spike or sometimes 

 capitate; corolla 3 to 4 lines long (the calyx-teeth distinctly shorter), light 

 purple, the center of lower lip with white and dark purple markings; 2 Lower 

 stamens with large anthers, the 2 upper with very small anthers or none and 

 with shorter filaments; stigmas very unequal. 



Sacramento Valley in low ground. 



11. MELISSA L. 



Lemon-scented branching perennial, with broad dentate petioled leaves and 



white flowers in loose axillary clusters. Calyx narrowly campanulate, 13- 



nerved, deflexed in fruit; upper lip 3-toothed, the lower 2-parted. Corolla 



ted, nearly twice as long as the calyx, bilabiate, the upper lip erect. 



