Difference between revisions of "Phemeranthus rugospermus"
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|genus=Phemeranthus | |genus=Phemeranthus | ||
|species=Phemeranthus rugospermus | |species=Phemeranthus rugospermus |
Latest revision as of 22:56, 5 November 2020
Plants to 2.5 dm; roots elongate, fleshily woody. Stems ± erect, simple or sometimes branching. Leaves sessile; blade terete, to 6 cm. Inflorescences cymose, much overtopping leaves; peduncle scapelike, to 15 cm. Flowers: sepals deciduous, ovate, 4 mm; petals pink to magenta, ovate to obovate, sometimes mucronulate, 6.5–8 mm; stamens 12–28; stigmas 3, spreading widely, linear, 1/2–1/3 as long as styles. Capsules subglobose, 4 mm. Seeds without arcuate ridges, 1.2 mm, corrugate-rugulose overall. 2n = 24.
Phenology: Flowering May–Aug.
Habitat: Sand or sandy soils, dunes, mounds, flats, banks, ridges, edges of igneous or metamorphic rock outcrops, along or near watercourses
Elevation: 0-500 m
Distribution
![V4 1004-distribution-map.gif](/w/images/4/4a/V4_1004-distribution-map.gif)
Ill., Ind., Iowa, Kans., La., Minn., Nebr., Tex., Wis.
Discussion
Within the overall area of its distribution, Phemeranthus rugospermus is nowhere abundant, its occurrence being everywhere spotty and localized. According to T. S. Cochrane (1993), the disjunctions probably reflect a history of long-distance dispersal from a center in the partially unglaciated Kansas and Nebraska sandhills, the present-day gaps resulting from a paucity of suitable habitats between that area and the others where it is now found. Even so, its discovery in Missouri, Arkansas, and/or Oklahoma would not be surprising.