Eastern Mojave Vegetation Button-like caudex of Coll. No. 1811, Senecio integerrimus  
 

 

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  Asteraceae, Senecio integerrimus
Scanned 8 October 2018.

Coll. No. 1811, 10 May 2018, characters observed: Perennial, herb, to 40 cm., sap clear, caudex button-like; Stem, multicellular arachnose throughout; Leaves, basal and cauline, alternate, basal, petiole, 70 mm., blade, 75 mm. × 12 mm. wide, sparsely arachnose, margin wavy and revolute in places, reduced above, cauline, sessile, blade 85 mm. × 10 mm. wide, reduced above, margin wavy and revolute in part; Inflorescence, corymbiform, heads #8-10 per stem, somewhat convex, >leaves; Pedicels, 5-20 mm., subtended by a bract to 6 mm., lanceolate; Involucre, 7 mm. × 10 mm wide, bowl-shaped, ±glabrous; Phyllaries, ±equal, in 1 series, 7 mm. × 1.8 mm. wide, green, eglandular, margins ±flat, not clasping ray ovaries, tips acuminate with terminal tuft of hairs; Receptacle, epaleate; Ray flowers, #8-10, tube 4 mm. + blade 5 mm. × 2.5 mm. wide, yellow, fertile; Disk flowers, many, tube 4.5 mm. + lobes 1 mm., yellow; Pappus, many, well-developed, bristles, ±equal; Cypsela, 1.3 mm., brown.

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Date and time this page was prepared: 12/15/2018 4:35:09 PM