Kentucky Plant Atlas




  
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Rubiaceae <Spermacoceae> Houstonia <Houstonia> [Hedyotis] pusilla (patens, ?minima; He. crassifolia)
Houstonia pusilla Schoepf
ALI: no HAB: S-10,7, ::::, C, 6 ABU: g9, s8, 1
This weedy diploid (2n = 16) annual is widespread across southeastern states. In Ky. it occurs mostly in lawns, mowed pastures or similar disturbed ground in warmer regions. Mapped records here include H. minima Beck from ALLE (WKY), HICK (MUR), FULT (MUR), ?MCRA (Terrell 1996) and WARR (WKY). F considered minima to be distinct, due to its larger calyx lobes; also it tends to have smaller leaves and a lower, more sprawling habit. But Terrell indicated that this largely midwestern taxon intergrades extensively with the more widespread southern pusilla, and should not be segregated. In Ky. there is no clear difference in range or habitat.