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The pygmy bluet (Houstonia wrightii) belongs to Rubiaceae (the Madder family). It is a perennial herb that is native to the south-western United States and northern Mexico. This herb grows in grasslands, coniferous woodlands, rocky hillsides, and up to a height of 30 cm. The stems are woody around the base. The leaves are linear to elliptic or narrowly oblanceolate, up to 2.5 cm long. They are angled at about 90 degrees from the stem. The white, pink or pale purple, small flowers bloom in compact, slightly elongated clusters, from May to October. They have a funnel-shaped corolla, 8-9 mm long.
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