Lagenandra Dalzell 1852
Creators: name: Madola, Indrakheela
name: Yakandawala, Kapila
name: Yakandawala, Deepthi
name: Karunaratne, Senani
Publisher: name: Zenodo
Year: 2021
Subjects: Biodiversity
Taxonomy
Plantae
Tracheophyta
Liliopsida
Alismatales
Araceae
Lagenandra

description: Key to the species of Lagenandra from Sri Lanka   
Modified from Nicolson (1987).  
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; outside of spathe limb whitish, inside black-purple and with tan, branched, hair-like protuberances.............................................................................................................. L. jacobsenii   
– Spathe limb sub-erect, cylindrical and opening subvertically; outside of spathe limb purplish, inside with inconspicuous purplish protuberances......................................................................................................................................................................................8  
 8. Peduncle c. 2 cm; leaf blades often silver margined; stigma unequal; female flowers subscabrid on sides.................... L. thwaitesii   
 – Peduncle 7–12 cm; leaf blades not silver margined; stigma dome-shaped; female flowers with long protuberances below stigma............................................................................................................................................................................................... L. bogneri
description: Published as part of Madola, Indrakheela, Yakandawala, Kapila, Yakandawala, Deepthi & Karunaratne, Senani, 2021, Lagenandra wayambae (Araceae), a new endemic species from a freshwater swamp forest of Sri Lanka, pp. 216-222 in Phytotaxa 489 (2) on page 221, DOI: 10.11646/phytotaxa.489.2.10, http://zenodo.org/record/5756646