Jepson Flora Project: Jepson Interchange    
 

The Jepson Manual: Higher Plants of California

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    AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY
  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

Names are linked to treatments from the Manual


Key to GENTIANA

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

  1. Annual; stem < 1 dm; leaf < 15 mm; flower < 2 cm (sect. Chondrophyllae)
 
    2. Leaves dissimilar, upper cauline strongly ascending, much narrower than basal, margins of all conspicuously white; corolla lobes white to pale blue, exterior often dark blue
G. fremontii
    2' Leaves all ± similar, ± spreading, margins not or obscurely white; corolla medium to deep blue on both sides
G. prostrata
  1' Perennial; stem generally > 1 dm; leaf > 15 mm; flower > 2 cm (sect. Pneumonanthe)
 
    3. Stems arising laterally from caudex, below a rosette
 
      4. Stems > 1 dm; leaves of middle to upper stem < internodes; corolla ± uniformly blue
G. setigera
      4' Stems generally < 1 dm; leaves of stem generally > internodes; corolla white to deep blue, except exterior on and below lobes sometimes dark brownish purple
G. newberryi
        5. Corolla medium to deep blue
var. newberryi
        5' Corolla white to pale blue except exterior on and below lobes sometimes dark brownish purple
var. tiogana
    3' Stems arising terminally from caudex, rosettes 0
 
      6. Sinuses between corolla lobes ± truncate
G. sceptrum
      6' Sinuses between corolla lobes with a conspicuous, toothed or fringed appendage
 
        7. Corolla sinus appendages divided ± to base into several thread-like parts; leaf base sheaths at mid-stem generally > 5 mm
G. plurisetosa
        7' Corolla sinus appendages divided ± to base or < 1/2 way to base into often 2 parts, each thread-like only toward tip; leaf base sheaths at mid-stem < 5 mm
 
          8. Leaf, calyx lobe margins minutely ciliate; calyx lobes generally <1.5 mm wide; corolla lobes generally < 7 mm; inflorescences terminal and at 1–6 upper nodes, flowers 1–several per inflorescence
G. affinis var. ovata
          8' Leaf, calyx lobe margins generally obscurely, minutely dentate, not ciliate; calyx lobes generally > 2 mm wide; corolla lobes generally > 7 mm; inflorescences generally terminal (sometimes also at 1–3 upper nodes), flowers 1–few
G. calycosa


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