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|Family: Amaranthaceae||View Description||Dichotomous Key|
|Genus: Amaranthus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Amaranthus arenicola I.M. Johnst.
Habit: Dioecious. Stem: erect, 4--100(200) cm, generally many-branched, green-white, +- glabrous. Leaf: petiole 10--70 mm; blade 15--75 mm, 5--30 mm wide, narrow-ovate to elliptic or lanceolate, base wedge-shaped to +- round, tip +- acute to obtuse, margins flat to irregular-wavy. Inflorescence: terminal (and axillary), erect to nodding, spike- or panicle-like, main axes 15--60 cm, 1.1--2.2 cm wide (including flowers), green; staminate bracts 2--3.5 mm, < perianth parts, tip acute to acuminate; pistillate bracts (1.4)2--2.5 mm, <= perianth, ovate to lance-ovate, tip acute to acuminate with midrib short-elongated, not spiny. Flower: staminate perianth parts 5, 2--3.5 mm, +- equal, tip obtuse to +- acute, inner perianth parts +- mucronate, stamens 5; pistillate perianth parts 5, 1.6--2.5 mm, spoon-shaped, tip obtuse, mucronate; stigmas 2--3, +- erect. Fruit: circumscissile; +- 2 mm, < perianth, +- spheric, smooth, +- brown. Seed: 0.9--1.2 mm, lenticular, dark red-brown, smooth, shiny.
Ecology: Sandy soils; Elevation: < 200 m. Bioregional Distribution: ScV, CCo, SCo; Distribution Outside California: native to central and eastern United States. Flowering Time: Aug--Sep
eFlora Treatment Author: Mihai Costea
Jepson Online Interchange
Previous taxon: Amaranthus albus
Next taxon: Amaranthus blitoides
Citation for this treatment: Mihai Costea 2016. Amaranthus arenicola, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=12895, accessed on February 06, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 06, 2016.