|University of California, Berkeley|
|Jepson eFlora: Taxon page
Key to families | Table of families and genera
Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
|Family: Amaranthaceae||View Description||Dichotomous Key|
|Genus: Amaranthus||View Description||Dichotomous Key|
|Species:||View Description||Dichotomous Key|
Amaranthus albus L.
Habit: Monoecious. Stem: prostrate to erect, 10--100 cm, generally many-branched, +- green, white when dry, moderately to densely woolly distally. Leaf: petiole 5--40 mm; blade elliptic to obovate or narrow-spoon-shaped, base wedge-shaped, tip obtuse to acute, margins flat or +- wavy; stem leaves generally deciduous, 40--80 mm, 15--30 mm wide, replaced by axillary leaves, 7--20 mm, 3--10 mm wide. Inflorescence: axillary clusters only, green; bracts 1.5--4 mm, 1.5--2 × perianth, lance-linear to awl-like, tip +- spined. Flower: staminate flowers intermixed with pistillate, perianth parts 3, stamens 3; pistillate perianth parts 3, 0.7--2 mm, +- equal, lance-oblong to linear, tip acute; stigmas 3, erect. Fruit: circumscissile; 1.5--2 mm, >= perianth, ellipsoid-ovoid, green-white to brown, wrinkled especially near tip. Seed: 0.8--1.1 mm, lenticular, red-brown, smooth, shiny. Chromosomes: 2n=32.
Ecology: Disturbed areas, roadsides, riverbanks, sandy places, agricultural fields; Elevation: < 2500 m. Bioregional Distribution: CA; Distribution Outside California: North America; cosmopolitan; native to central North America. Flowering Time: Jun--Oct
eFlora Treatment Author: Mihai Costea
Jepson Online Interchange
Previous taxon: Amaranthus
Next taxon: Amaranthus arenicola
Citation for this treatment: Mihai Costea 2016. Amaranthus albus, in Jepson Flora Project (eds.) Jepson eFlora, http://ucjeps.berkeley.edu/cgi-bin/get_IJM.pl?tid=12892, accessed on February 11, 2016.
Citation for the whole project: Jepson Flora Project (eds.) 2016. Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html, accessed on February 11, 2016.