Malvastrum. MALVACEAE. 311 



M.* aboriginum, Robinson, n. sp. Branches covered with a soft white felted tomentum : 

 leaves broadly ovate, cordate with a shallow and narrow sinus, obtuse, 3-5-lobed and creuate- 

 dentate, inch and a half in length, somewhat broader, rugulose above, scarcely paler beneath, 

 borne on petioles of nearly their own length : flowers sessile, glomerate in the upper axils 

 and above forming elongated flexuous almost naked interrupted terminal inflorescences: 

 bractlets of the involucel 3, ovate, 4 to 5 lines in length, 3 to 3^ lines in breadth, sometimes 

 slightly connate at the base : calyx short and strongly plicate-angled, canesceut-tomentu- 

 lose ; segments broader than long, abruptly acuminate: carpels about 8. — Indian Valley, 

 California, Mrs. M. K. Cumin, June, 1885 (herb. Calif. Acad. Sci.). Well characterized 

 among American species by its broad bractlets, which, however, occur in some South Afri- 

 can congeners. 



4— 4— H — I— Herbage and calyx densely stellate-tomentose ; no hirsute hairs : involucellate 

 bractlets more naked, filiform, rather deciduous : carpels oval with excised insertion, thin- 

 walled, at length smooth, promptly 2-valved : leaves rounded, obscurely lobed, rather short- 

 petioled, thickish : stems robust, 2 or 3 or even 6 to 8 feet high. 



M. marrubioides, Durand & Hilgard. Suffruticose ? 2 or 3 feet high, roughish with 

 short-rayed tomeutose pubescence : leaves broadly ovate, rarely subcordate, irregularly 

 and often sharply dentate, inch or two long, or uppermost smaller : flowers subsessile in 

 short subsessile axillary clusters : calyx-lobes long-attenuate or caudate-acuminate from 

 an ovate base, at length half inch long : petals over half inch long, rose-color. — Jour. Acad. 

 Philad. ser. 2, iii. 38, & Pacif. R. Rep. v. 6, t. 2 ; Brew. & Wats. Bot. Calif, i. 85 ; Gray, 

 Proc. Am. Acad. xxii. 290. M.foliosum, Wats. ibid. xx. 356. ' — California, near Millerton 

 on the upper San Joaquin, Heermann ; also Santo Thomas, northern borders of Lower Cali- 

 fornia, Orcutt, 1884. 



Var. paniculatum, Gray, 1. c. Less canescent : flowers copious in loose sometimes 

 slender-pedunculate panicles, some rather slender-pedicellate. — Northern part of Lower 

 California, at All Saints' Bay, Orcutt, 1886. 



M.* Fremontii, Torr.^ Shrubby below, 4 to 8 feet high, densely soft-tomentose with 

 longer-rayed stellular pubescence : leaves pentagonal or roundish, shallowly or scarcely at 

 all cordate, crenate-toothed, the larger 3 inches broad : flowers in axillary-sessile or short- 

 pedunculate clusters, at summit of stem interrupted-spicate : calyx densely lanate-tomentose, 

 the short triangular acute lobes 2 to 2| lines long, mucronate with a more naked tip : 

 "flowers rose-scented; petals rose-color," hardly half inch long. — Torr. in Gray, PI. Fendl. 

 21.'* Sphceralcea Lindheimeri, Brew. & Wats. Bot. Calif, i. 86, as to Calif, pi., not Gray, the 

 resemblance superficial. — Mountains of California, from San Bernardino Co., Parish, to 

 Calaveras Co., Rattan ; first coll. by Fremont, next by Breicer. 



Var.* cercophorum, Robinson, n. var. Calyx much longer, 7 to 8 lines in length ; 

 the lance-linear divisions caudate-attenuate, equalling or nearly equalling the petals. — 

 Arroyo del Valle, Alameda Co., California, coll. Prof. E. L. Greene, 14 June, 1895 (herb. 

 Univ. of Calif.). 



M.* arcuatum, Robinson, n. comb. Shrub with long subsimple terete branches covered 

 with a dense white felted tomentum : leaves ovate, petiolate, obtuse or rounded at the base, 

 deeply crenate but scarcely or not at all lobed, thickish and very rugose, soon green above 

 but densely canescent-tomentose beneath : flowers sessile in the upper axils and forming at 

 the ends of the branches long interruptedly spicate unilateral inflorescences ; bractlets linear- 

 filiform, equalling the calyx : this soft tomentose but by no means so densely woolly as in the 

 last preceding species : petals roseate, three fourths inch long: young carpels densely tomen- 

 tose. — Malveopsis arcuata, Greene, Man. Bay-Reg. 66. Malvastrum marrubioides, Greene, 

 Fl. Francis. 109, not Dur. & Hilg. — California, "eastern slopes of the Coast Range back of 

 Belmont." A species to be recognized by its peculiar very rugose ovate not pentagonal 

 leaves. 



1 Add syn. Malveopsis marruliuitles, Kuntze, 1. c. 



2 The description of this species has been slightly modified to exclude more clearly the next fol- 

 lowing. 



3 Add syn. Malveopsis Fremonti, Greene, Erythea, i. 171. 



