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 Image: Basionym: Genus Basionym: Notes:

401. Arenaria howellii Watson Arenaria howellii Watson

402. Article Article

403. Senecio howellii Greenman Senecio howellii Greenman

404. Trifolium harneyensis Howell Trifolium harneyensis Howell Trifolium

405. Senecio howellii Greenm. Senecio howellii Greenm.

406. Antennaria howellii Greene Antennaria howellii Greene Antennaria

407. Astragalus craigii Jones Astragalus craigii Jones Astragalus

408. Aplopappus howellii Gray Aplopappus howellii Gray

409. Arabis howellii S. Watson Arabis howellii S. Watson Arabis

410. Hieracium barbigerum Greene Hieracium barbigerum Greene

411. Valaea howellii Coulter & Rose Valaea howellii Coulter & Rose

412. Thelypodium eucosmum Rob. Thelypodium eucosmum Rob. Thelypodium

413. Saxifraga occidentalis S. Watson Saxifraga occidentalis S. Watson

414. Agrostis foliosa Vasey Agrostis foliosa Vasey

415. Cnemidophacos reventiformis (Rydb.) Barneby Cnemidophacos reventiformis (Rydb.) Barneby Cnemidophacos

416. Lupinus subvexus C.P. Sm. var. transmontanus C.P. Sm. Lupinus subvexus C.P. Sm. var. transmontanus C.P. Sm. Lupinus

417. Limnanthes floccosa Howell Limnanthes floccosa Howell Limnanthes

418. Arabis koehleri Howell Arabis koehleri Howell Arabis

419. Agrostis foliosa Vasey Agrostis foliosa Vasey

420. Arabis suksdorfii Howell Arabis suksdorfii Howell Arabis
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