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Grayia
Family:
Amaranthaceae
Megan Swan
FNA
Resources
Noel H. Holmgren in Flora of North America (vol. 4)
Shrubs,
dioecious or monoecious, spinescent; herbage scurfy-puberulent when young, mostly with branched hairs, becoming glabrate.
Stems
erect, much branched, woody throughout, not jointed, forming a rounded bush; younger branches ribbed, rigid; lateral branches becoming spinescent.
Leaves
alternate, succulent or coriaceous; blade with midveins prominent, spatulate to oblanceolate, sometimes narrowly so, base gradually tapering to petiole, margins entire, apex rounded to obtuse.
Inflorescences
terminal, spikelike clusters.
Flowers
unisexual; staminate in 2-5-flowered clusters in bract axils, perianth 4(-5)-parted, equaling or slightly longer than stamens, stamens 4-5; pistillate in 1
-
few-flowered clusters per glomerule, each closely invested by 2 wholly united bracts, perianth absent; stigma 2-lobed.
Fruiting structure:
bracts forming flattened, samaralike fruiting structure around utricle, margins thickened, spongy within; pericarp free.
Seeds
vertical, compressed-lenticular, seed coat brown, tuberculate; embryo annular; perisperm copious.
x
= 18.
Grayia arizonica
Images
not available
Map not
Available
Grayia brandegeei
Images
not available
Map not
Available
Grayia plummeri
Images
not available
Map not
Available
Grayia spinosa
Map not
Available