Eastern Mojave Vegetation Coll. No. 1953, Ipomopsis aggregata ssp. attenuata  
 

 

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  Polemoniaceae Ipomopsis aggregata attenuata
Photographed 26 December 2018.

Coll. No. 1953, 20 June 2018, characters observed: Calyx, tube 2.5-3.0 mm. + lobes 3.5-4.0 mm.; Corolla, filiform, tube 20 mm. × 1 mm. wide flaring gradually to 3 mm. + lobes 7.5-8.0 mm.; Anthers, close to orfice.

Two subspecies of Ipomopsis aggregata (Pursh) V.E. Grant have been collected within ½ km. radius of this collection. J. E. Tear, Jr. #258, 1993-06-16, CS81546, was determined I. a. subsp. weberi V.E. Grant & Wilkin by Ackerfield. Ackerfield (2015) now treats subsp. weberi as a synonym of I. a. subsp. attenuata (A. Gray) V.E. Grant & A.D. Grant. B. E. Nelson #49939, 2000-6-27, RM760254, was determined I. a. subsp. aggregata.

This specimen will key ambiguously to either subsp. attenuata or subsp. aggregata in Ackerfield (2015) depending upon how much weight one places on the shape of the corolla tube vs. the position of the anthers. However, this specimen keys unambiguously to subsp. attenuata in Grant & Wilkin (1986) based upon the shape and dimensions of the corolla tube and the position of the anthers.

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Date and time this page was prepared: 10/12/2019 9:36:21 AM