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Lastarriaea
Family:
Polygonaceae
Images
not available
FNA
Resources
James L. Reveal in Flora of North America (vol. 5)
Herbs,
annual; taproot slender.
Stems
arising directly from the root, prostrate to ascending, solid, not fistulose or disarticulating into ringlike segments, thinly pubescent.
Leaves
quickly deciduous, basal, rosulate; petiole present; blade linear, margins entire, hirsute.
Peduncles
absent.
Inflorescences
terminal, cymose, often uniparous due to suppression of secondaries; branches dichotomous, brittle and disarticulating into segments, round, thinly pubescent; bracts 2, opposite, connate proximally, lanceolate to narrowly ovate, mucronate or awned, thinly pubescent.
Involucral bracts
obvious, in 1 whorl of 3, linear to broadly lanceolate, awn-tipped.
Flowers
1 per involucral cluster; perianth light green to greenish white, cylindric, thinly pubescent abaxially; tepals 5, connate 1/ 3/ 4 their length, slightly dimorphic, coriaceous, acute and awn-tipped apically; stamens 3; filaments basally adnate, glabrous; anthers cream to white, oval.
Achenes
mostly included, brownish, not winged, lenticular to slightly 3-gonous, glabrous.
Seeds:
embryo straight.
x
= 20.
Species within checklist:
Yellowstone National Park NEON (YELL) plants - Northern Rockies (D12)
Lastarriaea chilensis
Images
not available
Map not
Available
Lastarriaea coriacea
Images
not available
Map not
Available