504 MALVACEAE 



In inflorescence, in calyces ami in carpels, S. rosacea and S. ambigua arc similar and variable in 

 a parallel manner. There is, apparently, no constant difference between these two save in the 

 color of the corolla. The specific status of S. rosacea, therefore, needs further investigation. 



Locs. — Palm Sprs. of San Jacinto, Parish 4109; Palm Canon of San Jacinto, Oilman 717; 

 Deep Canon, Santa Kosa Mts., Clarii 783; Coyote Wells, San Diego Co., T. Brandegee; Myers 

 Creek bridge, foot of Mountain Sprs. grade, Jepxon 11,7SG. 



Kefs.— Sph.'vekalce.\ rosacea M. & J. Bull. Torr. Club 49:353 (1922), type loc. Palm Sprs. 

 of San Jacinto, Alice B. Chittenden. S. purpurea Parish; Jepson, Man. 635 (1925), type loc. 

 Mountain Sprs., e. San Diego Co., Parish 9101. 



18. S. rivnlaris Torr. var. cismontana Jepson var. n. ^NIaple Mallow. Stems 

 erect, 2 to 'A feet liigli; lierbajre ^reen, finely puberulent; leaves maple-like, the 

 blades deeply 5-lobed (the lobes acute, irre<>:iilarly serrate), truncate or subcordate 

 at base, 2 to 6V2 inches long; petioles % to S^/i inches long; flower-clusters sessile 

 or nearly so in the axils of the upper much-reduced leaves and thus interruptedly 

 spicate at the summit of the branches; calyx-lobes ovate, acuminate, shorter than 

 the mature carpels; petals rose-color, % to 1 inch long; back of carpels densely 

 puberulent and also conspicuously covered with long ascending bristles. — (Caules 

 erecti, ped. 2-3 alti; herbae virides, minute puberulae; folia acerina, profunde 

 5-lobata (lobis acutis, irregulariter serratis) basi truncata vel subcordata, unc. 

 2-6^/^ longa ; petioli unc. Mj-^i/i longi ; inflorescentia interrupte spicata, floribus in 

 axillis foliorum superiorum reductorum aggregatis; calycis lobi ovati, acuminati, 

 carpellis maturis breviores; petala rosea, unc. %-l longa; carpella dorsaliter dense 

 puberula. aciculis longis ascendentibus dense tecta.) 



Gallons or openings at edge of forests, 500 to 2500 feet : Humboldt Co. June- 

 July. 



Locs. — Humboldt Co.: Bald Mt., F. P. Fox; Prairie Creek, Tracy 7585; Three Creeks, Jep- 

 son 2127 (type). 



Eefs. — Sphaebalcea rivularis Torr.; Gray, Mem. Am. Acad. 4:23 (1849). Malva rivu- 

 laris Dougl.; Hook. FI. Bor. Am. 1:107 (1830), "river banks of North-west America from the 

 ocean to the Eocky Mts.," Douglas. S. aceri folia Nutt.; T. & G. Fl. 1:228 (1838), "rivulets east 

 of Wallawallah" (Wash.), N2ittall; Hook. Bot. Mag. t. 5404 (1863). Var. cismontana Jepson. 

 S. aceri folia, Jepson, Man. 635 (1925), as to Humboldt Co. plants. 



19. S. bakeri Jepson. Lava Mallow. Stems erect, several from the root- 

 crown, 1 to II/4 feet high; herbage finely puberulent; blades of the lower leaves 

 sub-orbicular, truncatish at base, crenately lobed and crenate, 3 to 12 lines long, 

 the upper leaves often cuneate-obovate in outline, irregularly serrate on upper 

 half or somewhat 3-lobed, % to 1 inch long; flowers mostly solitary in the upper 

 axils, on peduncles 2 to 7 lines long; calyx-lobes round-ovate, abruptly acuminate, 

 3 to 4 lines long; petals rose-pink, % inch long; fruit 5 to 6 lines long; carpels 

 closely puberulent and also densely covered with long ascending dull- white bristles. 



Lava beds, 3200 to 4000 feet : boundary of Shasta and Modoc Cos. Aug. 



Tax. note. — This species is too little known geographically. It is, however, quite different 

 in general aspect from specimens of Sphaeralcea rivularis collected in the type region and north- 

 east. It differs from the original description of S. rivularis Torr. as follows: (a) the flowers are 

 usually solitary in the axils; (b) the bases of the leaf -blades are truncate or cuneate; (c) the 

 blades of the upper leaves are often cuneate-obovate. 



Locs. — Fall Eiver "Valley; betw. Hot Springs Valley (se. Modoc Co.) and Hills farm, upper 

 Fall River Valley, M. S. Balcer 554. 



Ref. — Sphaeralcea bakeri Jepson, Man. 635 (1925), type loc. Fall River Valley, ne. Shasta 

 Co., M. S. Balcer. 



8. HORSFORDIA Gray 



Ours woody plants, the stems 3'ellowish or greenish-yellow, covered with a 

 dense felt. Leaves (in ours) with the blades ovate to ovate-lanceolate, cordate 

 or subcordate at base, leathery or with a plush-like sheen, subentire or irregularly 

 denticulate. Peduncles 1 to 3 in the axils or raised on a short axillary branchlet, 

 each 1-flowered. Bractlets none. Cah^s: 5-lobed. Carpels 3-ovuled, 1 to 3-seeded; 

 lower portion of carpel firm, reticulate on sides, 1-seeded, somewhat constrictedly 



