Jepson Flora Project: Jepson Interchange    
 

The Jepson Manual: Higher Plants of California

    THIS PAGE IS NO LONGER UPDATED
    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 TRICHOSTEMA

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

  1. Shrub, < 1.5 m
 
    2. Corolla tube 9–14 mm; inflorescence hairs 2–3 mm, obscuring pedicels
T. lanatum
    2' Corolla tube 4–7 mm; inflorescence hairs 1–2 mm, not obscuring pedicels
T. parishii
  1' Annual, < 1 m
 
    3. Petiole distinct, 5–15 mm
 
      4. Corolla tube 4–8 mm, exserted, lower lip 4–7 mm
T. laxum
      4' Corolla tube 1.5–3 mm, included, lower lip 2–3 mm
T. simulatum
    3' Petiole indistinct or < 5 mm
 
      5. Stamens 10–20 mm; corolla tube curved abruptly upward near throat
 
        6. Leaf blade 2–7 cm, lanceolate to narrowly ovate, length > 3 × width; corolla tube 5–10 mm
T. lanceolatum
        6' Leaf blade 1–2 cm, ovate, length < 2 × width; corolla tube 2.5–5.5 mm
T. ovatum
      5' Stamens 2–6 mm; corolla tube curved gradually upward
 
        7. Hairs on stem and leaves curled or appressed; stamens 2–3 mm, ± included or barely exserted
T. micranthum
        7' Hairs on stem and leaves straight, spreading; stamens 3–6 mm, exserted
 
          8. Calyx lobes < 2 × tube; calyx tube > mature nutlets; mature calyx generally red-tinged
T. rubisepalum
          8' Calyx lobes > 2 × tube; calyx tube < mature nutlets; mature calyx green
 
            9. Leaf blade widely elliptic, length generally < 4 × width; calyx lobes generally widest above base
T. oblongum
            9' Leaf blade elliptic, length generally > 4 × width; calyx lobes widest at base
T. austromontanum
              10. Leaf ± = or < internode above
subsp. austromontanum
              10' Leaf >> internode above
subsp. compactum


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