Eastern Mojave Vegetation Coll. No. 122, Chaenactis glabriuscula  
 

 

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  Asteraceae Chaenactis glabriuscula
Scanned 7 November 2013.

Left to right:

  1. Two outer phyllaries.
  2. Two inner phyllaries.
  3. One outer flower.
  4. Four inner flowers.

Coll. No. 122, 29 April 1997, characters observed while keying: Annual, tap-rooted, to 15 cm.; Stems, leaves, and phyllaries all wooly; Leaves, alternate, not decurrent, 1(2) pinnate lobed; Inflorescence, none of the flowers with strap-shaped corollas, flowers of 1 kind, heads discoid, peduncled, cylindric to obconic; Phyllaries, in 2 series, ±equal (outer ≤ inner), ≤7 mm., green, margins not scarious; Receptacle, epaleate; Pappus, of well-developed flat scales, #4, ≤3 mm.; Corollas, yellow, open during day.

This keyed out fairly easily to Chaenactis glabriuscula var. glabriuscula by way of TJM2 Asteraceae Group 7. However, the location of this collection is way out of range for that taxon. There is one other collection of this taxon from the eastern Mojave (H. S. Reed, s.n., May 5, 1935, Wheaton Springs, UC914160) for which the determination or location has been questioned. If the corolla color is described as “ rarely pale yellow ” then the Chaenactis key takes one to a determination of “Chaenactis hybrid.” However, the yellow color of the corolla looks strong to me, which pretty much forces one into Chaenactis glabriuscula.

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Other photos about Species - Asteraceae or Chaenactis glabriuscula.

 


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Date and time this page was prepared: 11/7/2018 5:43:31 PM