Jepson eFlora
Key to families | Table of families and genera

Key to Trichostema

View taxon page for Trichostema

1. Shrub, < 1.5 m

2. Corolla tube 9–14 mm; inflorescence hairs 2–3 mm, obscuring pedicel ..... T. lanatum

2' Corolla tube 4–7 mm; inflorescence hairs 1–2 mm, not obscuring pedicel ..... 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. Corolla tube curved abruptly upward near throat; stamens 5–20 mm

6. Stamens 5–9 mm ..... T. ruygtii

6' Stamens 11–20 mm

7. Leaf blade 2–7 cm, lanceolate to narrowly ovate, length > 3 × width; corolla tube 5–10 mm ..... T. lanceolatum

7' Leaf blade 1–2 cm, ovate, length < 2 × width; corolla tube 2.5–5.5 mm ..... T. ovatum

5' Corolla tube curved gradually upward; stamens 2–6 mm

8. Stem, leaf hairs curled to appressed; stamens 2–3 mm, ± included to ± exserted ..... T. micranthum

8' Stem, leaf hairs straight, generally spreading; stamens 3–6 mm, exserted

9. Calyx lobes < 2 × tube; calyx tube > mature nutlets; mature calyx generally red-tinged ..... T. rubisepalum

9' Calyx lobes > 2 × tube; calyx tube < mature nutlets; mature calyx green

10. Leaf blade widely elliptic, length generally < 4 × width; calyx lobes generally widest above base ..... T. oblongum

10' Leaf blade elliptic, length generally > 4 × width; calyx lobes widest at base ..... T. austromontanum

11. Leaf <= internode above ..... subsp. austromontanum

11' Leaf >> internode above ..... subsp. compactum

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Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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