The Jepson Manual: Higher Plants of California

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Names are linked to treatments from the Manual


Key to PYRROCOMA

N.B.: couplets are linked, e.g., 1. is linked to 1'.

  1. Ray flowers obscure, often << disk flowers (heads seeming discoid); involucre subtended by leafy bracts
P. carthamoides var. cusickii
  1' Ray flowers conspicuous, >> disk flowers; involucre not subtended by leafy bracts
 
    2. Plant glandular
 
      3. Glands sessile; plant glabrous below; inflorescence crowded, spike-like
 P. lucida
      3' Glands stalked; plant generally hairy and red-tinged below; inflorescence raceme- or panicle-like
 
        4. Inflorescence panicle-like; plant sometimes becoming glabrous below
 P. lanceolata var. subviscosa
        4' Inflorescence raceme-like; plant tomentose below
 P. hirta
          5. Plant densely glandular; phyllaries equal, barely overlapping, herbaceous nearly to base
 var. hirta
          5' Plant sparsely glandular; phyllaries unequal, much overlapping, herbaceous only at tip
 var. lanulosa
    2' Plant glandless
 
      6. Head generally 1(–4)
 
        7. Phyllaries oblanceolate to oblong, in 3–4 graduated series, glabrous; fruit glabrous
 P. apargioides
        7' Phyllaries ± linear, in 2 series, not overlapping, long-soft-hairy; fruit silky
 P. uniflora
          8. Herbage tufted-woolly; involucres 10–13 mm; phyllaries unequal
 var. gossypina
          8' Herbage tomentose, becoming glabrous; involucres 6–9 mm; phyllaries equal
 var. uniflora
      6' Heads generally 5+
 
        9. Inflorescence panicle-like
 P. lanceolata var. lanceolata
        9' Inflorescence raceme- or ± spike-like
 P. racemosa
          10. Involucre 10–15 mm
 
            11. Stem cobwebby, hairs tangled; basal leaves lanceolate; phyllaries densely long-soft-hairy
 var. pinetorum
            11' Stem generally glabrous; basal leaves oblanceolate to elliptic; phyllaries ciliate
 var. racemosa
          10' Involucre 5–9 mm
 
            12. Inflorescence a narrow raceme- to panicle-like cluster, not crowded
 var. paniculata
            12' Inflorescence spike-like, generally crowded
 
              13. Involucre 12–16 mm diam, phyllaries yellow-green throughout, sparsely tomentose near base or throughout, tip glandular-ciliate
 var. congesta
              13' Involucre 5–7 mm diam, phyllaries green-tipped, leathery, ciliate (except recurved tip), margin translucent
 var. sessiliflora

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