A. albus is from trop. Am.
A. blitoides is native.
(b) Stems decumbent, branched from base, glabrous, 1-5 dm. long; (b) lvs. many,
the petioles 2-15 mm. long, the blades spatulate to obovate, 8-25 mm. long, deep
green; (a & b) monoecious; (b) fls. in dense axillary clusters usually
shorter than the petioles; (a) bracts subulate, green, rigid; (b) sepals 4-5,
oblong, acute or acuminate, 2-3 mm. long; (a) stamens 3, (b) stamens 3; (a)
utricle rugose, exceeding calyx; (a) seeds round, dark red-brown, shining, 0.8
mm. in diam. (I have inserted in
parenthesis, an (a) or (b) to indicate which characteristics belong to A. albus and which to A.
blitoides). There is a conflict
between Abrams and Munz as to the color of the leaves of A. blitoides, I have used the deep green color described in Abrams.
A. albus, Common weed in cult.
and waste places through much of N. Am. below 2200 M. May-Oct. A. blitoides,
occasional native weed in waste and
cult. places below 1500 m.; many Plant Communities; widely scattered in Calif.;
to Wash., Rocky Mts., Mex. May-Nov.
See A. albus for the origin of
Blitoides, like Blitum,
probably a genus name that included two species in the Chenopodiaceae, Blitum californicum, (now Chenopodium californicum) and Monolepis
nuttallianum. Amaranthus blitoides may have a growth habit resembling the Blitum
species. (John Johnson).
Uncommon in the study area. Found
once, in 1988, along the horse and bike path in the Santa Ana Heights area.
Found twice in 1990 on the banks above the freshwater stream at 23rd St.
(my comments). Amaranthus
species have been known to cause hay fever and asthma.
(Fuller 378). About 50 species, widespread except
in cold regions. (Munz, Flora
So. Calif. 60).
Abrams, Vol. II 99; Munz, Flora So.
July-Aug 87 #24,24A.
Identity: by R. De Ruff,
confirmed by F. Roberts.
Computer Ref: Plant Data 299.
Plant specimen given to UC Riverside in 2004.
Last edit 6/12/05.