Specklinia

Karremans, Adam P., Bogarín, Diego, Pupulin, Franco, Luer, Carlyle A. & Gravendeel, Barbara, 2015, The glandulous Specklinia: morphological convergence versus phylogenetic divergence, Phytotaxa 218 (2), pp. 101-127 : 105-106

Key to the glandulous species of Specklinia (as treated here)

1. Leaves elliptic to broadly elliptic,> 1 cm wide, peduncle lacking bracts, ovary trialate..................................................................2

- Leaves narrowly linear to ligulate, <4 mm wide, peduncle with a single bract, ovary terete...........................................................3

2. Flowers orange, sepals <8 mm long, dorsal sepal with no wart-like transparencies, petals 3-veined, lip apically bifid-emarginate. ............................................................................................................................................................................................. S. gersonii

- Flowers yellow, sepals> 10 mm long, dorsal sepal with conspicuous wart-like transparencies, petals 2-veined, lip apically obtuse ...................................................................................................................................................................................... S. chontalensis

3. Inflorescence subequal to the leaf, arched to semi pendulous, flowers large, sepals exceeding 7.5 mm long and lip 4.5 mm long, lip with a pair of conspicuous sub-trapezoid lateral lobes.................................................................................................. S. vittariifolia

- Inflorescence longer than the leaf, erect, flowers small, sepals between 4–6 mm long and lip 2.5–3.5 mm long, lip with a pair of relatively small triangular lateral lobes..............................................................................................................................................4

4. Inflorescence distichous, frequently multi-flowered (up to 6 flowers) ......................................................................... S. alajuelensis

- Inflorescence sub-fascicled, few-flowered (frequently 1 or 2 flowers).............................................................................................5

5. Inflorescence barely exceeding the leaf, flowers frequently cleistogamous, sepal ornamentation inconspicuous, petals narrow, oblong................................................................................................................................................................................ S. pertenuis

- Inflorescence conspicuously exceeding the leaf, flowers not cleistogamous, sepal ornamentation conspicuous, petals falcate......... ........................................................................................................................................................................................ S. glandulosa