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9b. Chorizanthe robusta Parry var. hartwegii (Bentham) Reveal & Rand. Morgan, Phytologia. 67: 358. 1989.
Scott Valley spineflower
Chorizanthe douglasii Bentham var. hartwegii Bentham in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 26. 1856 (as hartwegi); C. pungens Bentham var. hartwegii (Bentham) Goodman
Plants erect, (0.5-)1-3 × (0.1-)1-2.5 dm. Leaf blades 1.5-5 × 0.2-0.5(-0.7) cm. Involucres 2.5-3.5 mm, margins rose-pink.
Flowering Apr-Jul. Sandy outcrops, annual grassland communities; of conservation concern; 200-300 m; Calif.
Variety hartwegii is known from a few populations in Scott Valley, Santa Cruz County. The epithet “hartwegii” was misapplied to Chorizanthe pungens var. hartwegiana until 1989; see B. Ertter (1996) for details. Scott Valley spineflower is federally listed as endangered.
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