Psilactis asteroides [Asteraceae]

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Scientific Name Psilactis asteroides (Machaeranthera boltoniae) USDA PLANTS Symbol PSAS2
Common Name New Mexico Tansyaster ITIS Taxonomic Serial No. 508118
Family Asteraceae (Sunflower) Flora of North America Ref. Click Here
Description Habitat: Sandy soils along river and stream banks, ditches, fields and disturbed areas, 3000 to 4000 ft; uncommon.
Plant: Erect annual, single stem branched in upper portion, 1 to 3 or up to 5 feet tall; stems smooth or slightly glandular-hairy.
Leaves: Stem leaves oblanceolate to linear, 1/4-inch long or larger; bases cuneate to slightly cordate with entire margins, sometimes slightly clasping.
Inflorescence: Solitary composite flower heads about 3/4-inch across with 20 to 40 light blue to violet to white rays, and 40 to 75 yellow disk florets; phyllaries mostly herbacious and unequal length; outer oblong to narrowly elliptic to lanceolate, inner oblanceolate to lanceolate or linear-lanceolate.
Bloom Period: June to November.
References: ”Manual of the Vascular Plants of Texas" by Correll and Johnston and Flora of North America.
BONAP Distribution Map

Texas Status:

© Tom Lebsack 2021