Orthophytum subg. Clavanthus, Leme, S. Heller & Zizka, 2017
publication ID |
https://doi.org/ 10.11646/phytotaxa.430.3.2 |
persistent identifier |
https://treatment.plazi.org/id/039687DD-6651-301F-D5D9-F05FB0C9F945 |
treatment provided by |
Felipe |
scientific name |
Orthophytum subg. Clavanthus |
status |
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Key to the species of Orthophytum subg. Clavanthus
The first identification key for the species of Orthophytum subg. Clavanthus , covering six known species then considered members of the so called “subcomplex O. mello-barretoi ”, was presented by Leme (2008). However, with the three proposed new species, the key must be updated to encompass them.
1 Leaf blades densely and distinctly covered by a dense layer of white trichomes on both sides completely obscuring the color of the blades.................................................................................................................................................................................................. 2
1a Leaf blades glabrous or inconspicuously white lepidote adaxially .................................................................................................... 5
2 Plants 9–13 cm tall; flower fascicles 7–9 in number.................................................................................................... O. cristaliense View in CoL
2a Plants 17–19 cm tall; flower fascicles 4–5 in number........................................................................................................................ 3
3 Flowers 31–33 mm long; sepals ca. 18 mm long; petals 24–25 mm long .................................................................. O. piranianum View in CoL
3a Flowers 45–46 mm long; sepals 26–30 mm long; petals 36–37 mm long......................................................................................... 4
4 Sepals 26–27 mm long, greenish, densely to subdensely white lepidote; petals greenish except for the white lobes......................... .................................................................................................................................................................................... O. schulzianum View in CoL
4a Sepals ca. 30 mm long, reddish-orange toward the apex, glabrous; petals greenish-yellow.................................. O. eddie-estevesii View in CoL
5 Plants 10–18 cm tall; leaf blades 12–21 cm long............................................................................................................................... 6
5a Plants 30–40 cm tall; leaf blades 30–90 cm long............................................................................................................................... 7
6 Leaf blades 12–14 in number; flowers 28–31 mm long; petals 23–26 × 4.5 mm .................................................. O. mello-barretoi View in CoL
6a Leaf blades 13–21 in number; flowers 40–47 mm long; petals ca. 36 × 7 mm ......................................................... O. gouveianum View in CoL
7 Leaf blades thick coriaceous, 2–5 mm thick near the base; sepals suboblong, apex acute..................................... O. diamantinense View in CoL
7a Leaf blades coriaceous, to ca. 2 mm thick near the base; sepals narrowly lanceolate or triangular-lanceolate, apex acuminate...... 8
8 Leaf blades 38–90 × 3–4 mm, margins revolute; sepals 23–25 mm long.............................................................. O. graomogolense View in CoL
8a Leaf blades 30–36 × 2.5–2.7 mm, margins erect; sepals 17–18 mm long ............................................................... O. viridissimum View in CoL
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