ROSE AND STANDLEY—-PLANTS FROM THE PINACATE REGION. 18 
axillary; staminate flowers with linear, acute, sepals, their pale green petals broadly 
lanceolate and one-half longer; pistillate flowers with linear-lanceolate, attenuate 
sepals 6 to 8 mm. long, the petals spatulate, very short and inconspicuous; style tips 
not enlarged; capsule hirsute, the mature ones and seeds not seen. 
Type in the U. 8. National Herbarium, no. 45193, collected at Guaymas, Sonora, 
in 1887 by Dr. Edward Palmer (no. 624). 
A very distinct species, readily separated by its large, thin, finally glabrous leaves 
with slender petioles. 
Another species of Ditaxis from Lower California seems never to 
have been referred to the correct generic name: 
DitaXIS BRANDEGEI (Millspaugh) Rose & Standley. 
Argythamnia brandeget Millspaugh, Proc. Calif. Acad. II. 2: 220. 1889. 
Type locality, ‘‘San Gregorio,’ Lower California. 
Mozinna spathulata Orteg. Hort. Matr. Dec. 8: 105. pl. 13. 1799. 
Jatropha spathulata Muell. Arg. in DC. Prodr. 15 ?: 1081. 1866. 
Type locality, ‘‘Habitat in Nova Hispania.” 
Hornaday Range, Pinacate Mountains, November 14, 1907, MacDougal 21. 
Poinsettia eriantha (Benth.) Rose & Standley. 
Euphorbia eriantha Benth. Bot. Voy. Sulph. 51. 1844. 
Type locality, ‘‘Bay of Magdalena,” Lower California. 
Pinacate Mountains, at 600 to 900 meters, November 21, 1907, MacDougal 69. 
Stillingia linearifolia 8. Wats. Proc. Amer. Acad. 14: 297. 1879. 
Type locality, ‘‘S. California; near Boundary Monument, San Diego.” 
MacDougal Pass, Pinacate Mountains, November 14, 1907, MacDougal 59. 
Abutilon macdougalii Rose & Standley, sp. nov. PLATE 4, 
Herbaceous throughout, tall, probably about a meter high; stems stout, much 
branched, densely covered with soft, short, spreading hairs; leaves broadly ovate- 
cordate, 9 cm. long or usually smaller, the sinus closed, irregularly serrate, thick, 
velvety-tomentose on both sides, canescent beneath, all on petioles longer than the 
blades; inflorescence a terminal, sparingly branched panicle, the flowers on pedicels 
10 to 15 mm. long; lobes of the calyx triangular-ovate, attenuate, divided two-thirds 
of the way to the base, densely villous; petals orange yellow, 20 mm. long, more than 
twice as long as the calyx; carpels slightly surpassing the calyx, 10 in number, villous, 
with conspicuous, divergent, rather long beaks; seeds brown, glabrous, papillose. 
Type in the U. 8. National Herbarium, no, 574255, collected in the Pinacate Moun- 
tains, November 22, 1907, by Dr. D. T. MacDougal (no. 47). 
Near Abutilon aurantiacum but with different inflorescence and seeds, and with 
shorter calyces with narrower lobes. 
EXPLANATION OF PLATE 4.—Branch of the type specimen. Natural size. 
Hibiscus denudatus Benth. Bot. Voy. Sulph. 7. pl. 3. 1844. 
Type locality, ‘‘Bay of Magdalena,’’ Lower California. 
Papago Tanks, Pinacate Mountains, November 20, 1907, MacDougal. 
Sphaeralcea macdougalii Rose & Standley, sp. nov. Puiate 5. 
Stems stout, erect, branched, densely velvety-stellate; petioles 15 to 20 mm. long; 
leaf blades ovate, obscurely 3-lobed, obtuse, cordate at the base, densely velvety- 
stellate on both surfaces, prominently veined, the margins somewhat undulate; flowers 
few, in short terminal racemes; pedicels 1 cm. long or less; bracts subulate, incon- 
spicuous; calyx 10 to12 mm. high, cleft nearly to the base, the lobes oblong-lanceolate, 
acute, densely stellate; petals 2 cm. long, purplish red; immature carpels densely 
stellate on the back, 2-seeded, blunt, nearly smooth on the inner faces. 
