Lavanduloideae

Fragoso-Martínez, Itzi, Martínez-Gordillo, Martha & Luna, Efraín De, 2015, Salvia semiscaposa (Lamiaceae) a new species from Nanchititla, Mexico, Phytotaxa 219 (1), pp. 58-68 : 65

Key to the species of section Lavanduloideae from type locality of the new species

1. Pedicels tilted downwards, mature calyces reflexed..........................................................................................................................2

1. Pedicels erect or spreading, mature calyces ascendant or divaricate.................................................................................................5

2. Plants with erect stems .................................................................................................................................. Salvia helianthemifolia

2. Plants with procumbent stems or scapose habit................................................................................................................................3

3. Distal leaves evenly developed along the stems, leaves elliptical-lanceolate to linear; inflorescences spiciform .............................. ................................................................................................................................................................................ Salvia heterofolia

- Distal leaves scarcely developed on the stems, basal leaves obovate or ovate; inflorescences scapose .......................................... 4

4. Herbs 0.4–1 m tall; leaf surfaces moderately to densely covered with long appressed-hirsute trichomes; verticillasters with more than 6 flowers each.............................................................................................................................................. Salvia semiscaposa

- Herbs 0.2–0.4 m tall; leaf surfaces sparsely covered with short appressed trichomes; verticillasters with 2–6 flowers each............. ..................................................................................................................................................................................... Salvia scaposa

5. Plants with exclusively white flowers; calyx lobes caudate, 2–5 mm long ............................................................. Salvia rzedowskii

- Plants with blue or purple flowers; calyx lobes acute to obtuse, 1–2.5 mm long.............................................................................6

6. Leaf blades ovate-elliptical, glabrate; compact inflorescences (central verticillasters no more than 3 mm apart); pedicels inconspicuous ................................................................................................................................................................. Salvia stachyoides

- Leaf blades oblong-elliptical or elliptic-lanceolate, hirsute to pubescent; lax or interrupted inflorescences (central verticillasters more than 0.5 mm apart); pedicels conspicuous 1–2.5 mm long......................................................................................................7

7. Interrupted inflorescences, central verticillasters 1–3.5 cm apart; calyx surface lanate, calyx lobes acute........ Salvia moniliformis

- Lax inflorescences, central verticillasters 0.5–1.5 cm apart; calyx surface pubescent, calyx lobes obtuse, apex mucronate ............. ........................................................................................................................................................................... Salvia lavanduloides