444 LABIATAE 



Fria, Mariposa Co., Congdon; Fresno Creek above Eaymond, Madera Co., Hall 10,0-13; Eoger 

 Valley (3 mi. u. of Auberry), Fresno Co., Jepson 12,887; Badger, Tulare Co., T. Brandegee; Blue 

 Mountain foothills, Kern Co., Sail 4' Babcock 5005. 



Refs. — MoNARDELLA CAXDICANS Benth., PI. Hartw. 330 (1849), type loc. "in locis aridis 

 montium Sacramento," Hartweg 348, that is, right bank of the Yuba Eiver, Sierra Nevada foot- 

 hills (cf. Jepson, Erytliea 5:56) ; Jepson, Fl. W. Mid. Cal. 464 (1901), ed. 2, 363 (1911), Man. 

 884 (1925). Madronella candicans Greene, Lflts. 1:168 (1906). 



17. M. exilis Greene. Stem branchiug from the base or simple, 5 to 12 inches 

 high ; herbage puberuleut ; leaf -blades narrowly oblong, entire, i/o to 1 inch long, 

 the upper ones acute; flower-heads i/2 to % inch broad ; bracts abruptly acuminate, 

 often purplish, conspicuouisly white-margined, the veins parallel, with few or no 

 cross-veinlets ; calyx-teeth triangular-lanceolate, slightly hirsute ; corolla white, the 

 tube scarcely exserted. 



Sandy fiats, desert hills or mesas, 2000 to 4000 feet : southern Sierra Nevada in 

 Kern Co. ; western Mohave Desert. Apr. -June. 



Tax. note. — Monardella exilis is very closely related to M. candicans. There are reasons for 

 regarding it as a variety of M. candicans, as Asa Gray so disposed it. The differences are chiefly 

 of degree, the amount of whiteness of the bracts and of the calyx-teeth. The heads are, however, 

 smaller in M. exilis; they are, moreover, naked and borne on peduncles mostly 1 to 2% inches long, 

 while the heads in M. candicans are commonly leafy-bracteate and not properly peduncled or 

 scarcely so, since the uppermost pair of leaves usually subtends the heads rather closely. Other- 

 wise Monardella exilis has, markedly, the same type of organs as M. candicans. 



Locs. — Southern Sierra Nevada: Walker Pass, Purpns 5347; Kernville, T. Brandegee; Wel- 

 don. South Fork Kern Eiver, Voegelin 73. Western Mohave Desert: Mohave sta.. Hall # Chandler 

 783; Lancaster, Buran 3415; Little Eock Creek, n. slope San Gabriel Mts., Peirson 2416; Hes- 

 peria. Parish 2450; Deep Creek, n. slope San Bernardino Mts., Wheeler 1972; Rabbit Sprs., Hall 

 4- Chandler 6772. 



Refs. — Monardella exilis Greene, Pitt. 5:86 (1902). Monardella candicans Benth. var. 

 exilis Gray, Syn. Fl. ed. 2, 2 :358 (1886), type loc. "S. E. Cal. or adjacent Arizona," Palmer, more 

 precisely headwaters of the Mohave Eiver, as evidenced by Palmer's herb, label 364; Jepson, Man. 

 884 (1925). Madronella exilis Greene, Lflts. 1:169 (1906). 



18. M. leucocephala Gray. Stems branching, 4 to 10 inches high; herbage 

 pubescent; leaf -blades oblong- to ovate-lanceolate, entire, 6 to 8 lines long, short- 

 petioled ; heads many, small, terminal or axillary; bracts ovate to orbicular, shortly 

 acute, thin, white-scarious, the nerves hirsutulous ; tips of calyx-teeth white, subu- 

 late, recurved in age, hirsutulous ; corolla white. 



Dry sandy plains or depressions, 200 to 250 feet : east side of the San Joaquin 

 Valley near Merced and along the Tuolumne River. May-June. 



Note on endemism. — Monardella leucocephala, almost unique in the genus, is a singular spe- 

 cies limited to two narrow neighboring localities on the San Joaquin plains in Stanislaus and 

 Merced counties. It was first discovered "near Merced" by Bolander in 1866. Later, in 1878, it 

 was again collected by A. E. Bush, also near Merced. Possibly both these collections were ob- 

 tained in one restricted area on the sandy plain where the colony was subsequently destroyed by 

 cultivation, since the species is not known today in that district. Twenty-three miles north it 

 borders the Tuolumne River in a strip about 15 miles long. Three stations may be noted here: 

 near Basso Bridge, Jepson 50e in 1896 (abundant in sandy grain fields in rolling country) ; Water- 

 ford, 9 mi. e., Hoover 1232, in 1936, and 12 mi. e., Hoover 693, in 1935. Specimens are a rarity in 

 herbaria. Carl Epling, the monographer of Monardella, writes on the sheet of Jepson 50e the 

 foUomng note: "Nihil hoc posse mihi esse jucundius." 



Refs. — Monardella leucocephala Gray, Proc. Am. Acad. 7:385 (1868), type loc. Merced 

 plains, Bolander ("4845. Near Merced. Sandy soil") ; Jepson, Fl. W. Mid. Cal. 464 (1901), ed. 

 2, 363 (1911), Man. 884 (1925). Madronella leucocephala Greene, Lflts. 1:169 (1906). 



22. LYCOPUSL. Watee Hoarhound 



Perennial herbs similar to Mentha, but bitter and much less aromatic. Stems 

 erect, arising from rootstocks. Flowers very small, white or whitish, in sessile 

 densely capitate glomerules, apparently whorled. Calj'x campanulate, 4 or 5- 

 toothed. Corolla-tube (in ours) filled with horizontally spreading hairs which 

 close the tube as with a fine mesh ; upper lobe of corolla entire, the lower 3-lobed. 

 Fertile stamens 2, the upper pair without anthers, the tips of the filaments in ours 



