Pseudostellaria oxyphylla (Caryophyllaceae), A Long Overlooked Species from Northern Idaho

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Stellaria oxyphylla has been rediscovered in northern Idaho; a taxon rarely noted in the literature since its original description in 1898. Our study indicates that Stellaria oxyphylla is congeneric with Pseudostellaria, thus the new combination is provided. The three western North American members of Pseudostellaria have six capsular valves that dehisce by rolling back tightly 2 or 3 revolutions. forming a shallow dish, thus exposing the seeds. Pseudostellaria oxyphylla differs from P. sierrae and P. jamesiana in having internodal lines of hairs (0.5-5 mm wide) on the stems and branches of the inflorescences, but like the last taxon, the stems of P oxyphylla are square in cross section. In general appearance. P. oxyphylla is most similar to P. jamesiana, the congener widely distributed in the western United States. Pseudostellaria oxyphylla and P sierrae share a reduction in stamen number from 10 to 5 and seeds with elongate, rounded tubercles each with 5 to 12 or more minute stipitate glands or conical projections, respectively. Pseudostellaria oxyphylla is found along stream banks, often under and near conifers.

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Reference Code: A04HAR01IDUS <br>

Full Citation: Hartman, R. L. and R. K. Rabeler. 2004. Pseudostellaria oxyphylla (Caryophyllaceae), a Long Overlooked Species from Northern Idaho. Sida, Contributions to Botany. 21.(1): 175-179 <br>

Location: ELECTRONIC FILE - BOTANY: PLANT SPECIES: {Pseudostellaria oxyphylla}