Lagenandra undetermined
Creators: name: Madola, Indrakheela
name: Yakandawala, Deepthi
name: Yakandawala, Kapila
name: Karunaratne, Senani
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Alismatales
Araceae
Lagenandra
Lagenandra undetermined

description: Key for the identification of Lagenandra species in Sri Lanka
Modified from Nicolson (1987) and Madola et al. (2021).
1. Spathe distinctly warty outside...........................................................................................................................................................2
- Spathe smooth or merely roughened outside by papillae...................................................................................................................5
2 Warts large (1.5–3.0 mm long); spathe limb abruptly globular-inflated above the kettle....................................................... L. ovata
- Warts small (to 1.0 mm); spathe limb subcylindric............................................................................................................................3
3. Spathe large (more than 10 cm long); pistillate flowers more than 60........................................................................ L. praetermissa
- Spathe small (up to 10 cm); pistillate flowers less than 40 ................................................................................................................4
4. Spathe outside with few distinct irregular warts; leaves linear lanceolate to linear ovate ............................................. L. wayambae
- Spathe outside, rugose, not with distinct warts; leaves broadly elliptic or broadly lance-ovate...................................... L. lancifolia
5. Leaf-blade sublinear, c. 10 × longer than broad.................................................................................................................................6
- Leaf-blade ovate-lanceolate, to 5 × longer than broad.......................................................................................................................7
6. Leaf-blade to 50 cm long, margins smooth; inside of spathe limb strongly laterally ribbed, outside dark purple ............. L. koenigii
- Leaf-blade to 20 cm long, margins erose; inside of spathe limb rugose spongy, outside green ............................................. L. erosa
7. Spathe limb strongly twisted to one side, inflated and opening subhorizontally ............................................................ L. jacobsenii
- Spathe limb sub-erect, cylindrical and opening subvertically............................................................................................................8
8. Leaf blades often silver margined; Peduncle short.............................................................................................................................9
- Leaf blades not silver margined; Peduncle long...............................................................................................................................10
9. Leaf blade small (upto 20 × 4 cm); narrowly ovate to lanceolate; dark green, abaxial surface smooth; silver margin conspicuous; peduncle c. 2 cm ............................................................................................................................................................... L. thwaitesii
- Leaf blade large (upto 28 × 5.0– 10.5 cm); ovate to narrowly ovate; light green; with a faint silver margin, abaxial surface rugrose; peduncle c. 11 cm ......................................................................................................................................................... L. srilankensis
10. Leaf base round; spathe yellow-green; limb inside surface yellowish white; tail length 9–16 cm; twisted ....................... L. bogneri
- Leaf base tapering, acute; spathe light maroon/violet; limb inside surface maroon; tail length 3.0–6.5; un-twisted .......................... ..................................................................................................................................................................................... L. kalugalensis
description: Published as part of Madola, Indrakheela, Yakandawala, Deepthi, Yakandawala, Kapila & Karunaratne, Senani, 2021, Two new species of Lagenandra (Araceae) from the Wet Zone of Sri Lanka, pp. 187-199 in Phytotaxa 522 (3) on page 198, DOI: 10.11646/phytotaxa.522.3.2, http://zenodo.org/record/5560361