506 STANDLEY: SPECIES OF AMARANTHUS 
Type in the U.S. National Herbarium, 692084, collected in the 
vicinity of Guaymas, Sonora, Mexico, in 1887, by Dr. Edward 
Palmer (3172). 
This sheet consists of pistillate specimens. As typical of the 
staminate plant may be taken sheet no. 692083, collected at the 
same locality in the same year by Dr. Palmer, under his 
number 675. Additional specimens examined. Sonora: Guay- 
mas, 1887, Palmer 676. LOWER CALIFORNIA: La Paz, near sea 
level, February 17, 1906, Nelson & Goldman 7532; between Santo 
Domingo and Matancita, alt. 15 to 30 meters, November 14—-15, 
1905, Nelson & Goldman 7282; Cape St. Lucas, Xantus 100. 
The proposed species is related to Amaranthus Palmeri S. 
Wats., and the type collection was determined by Dr. Watson 
as that species. It is readily distinguished by its glandular 
pubescence, relatively broader, very obtuse, emarginate leaves, 
and shorter bracts. The staminate spikes, too, are less dense and 
usually considerably thicker. Both species were collected by 
Dr. Palmer at Guaymas, and it is possible that in some cases 
they were distributed under the same number. 
Amaranthus Torreyi suffruticosus is doubtless to be placed here, 
although the specimens are so old and fragmentary that they 
do not represent the species well. It would be unfortunate to 
retain the name suffruticosus, since the plant is as truly herbaceous 
as all the other North American members of the genus. 
Amaranthus myrianthus Standley sp. nov. 
Stems prostrate or ascending, 3-10 dm. long, much branched, 
stout, succulent, glabrous or sparsely villous; petioles stout, 4-15 
mm. long; leaf blades rounded-oval to oval or nearly orbicular, 
6-20 mm. long, 5-15 mm. wide, rounded or emarginate at the 
apex, rounded to cuneate at the base, thick and firm, very con- 
spicuously veined, villous beneath, at least when young; inflores- 
cence dioecious, of numerous paniculate many-flowered spikes, 
these dense or sometimes interrupted below, 6-40 cm. long and 
I~2 cm. thick in the pistillate plants, the spikes of the staminate 
plants shorter, somewhat interrupted, few-flowered, 7 mm. OF 
less in diameter; bracts 2 or 3 at the base of each flower, ovate 
or broadly ovate, acute, sometimes pungent-tipped, usually half 
as long as the sepals but sometimes nearly equaling them; sepals 
of the staminate flowers oblong to oval, 2.5 mm. long, obtuse, 
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