Elaeocarpus, Burm. ex Linnaeus, 1753

Silva, Nilanka, Yakandawala, Deepthi & Yakandawala, Kapila, 2023, Elaeocarpus mahamayensis (Elaeocarpaceae), a new endemic species from the Knuckles Mountain Range in Sri Lanka, Phytotaxa 616 (1), pp. 1-26 : 11-12

Key to the species of Elaeocarpus occurring in Sri Lanka

1. One anther valve tipped with a brush of hairs.................................................................................................................... E. serratus

- Anther valves not tipped with brush of hairs.....................................................................................................................................2.

2. One anther valve elongated into a beak or bristle; fruits ovoid-cylindrical, 1–1.5 cm across, mature fruit blue .............................3.

- Anther valves without beaks or bristles; fruits globular or sub-globular-ovoid, 2.5 cm or more across, mature fruits green or red .. ...........................................................................................................................................................................................................4.

3. Leaf blades ovate, apex acuminate, margin shallowly serrate-crenate; domatia present .............................................. E. ceylanicus

- Leaf blades lanceolate, long-attenuate at apex, margin more or less coarsely serrate-crenate; lower face with domatia as large glandular pits in axils of lateral nerves.......................................................................................................................... E. glandulifer

4. Leaf blades pubescent on abaxial surface .........................................................................................................................................5.

- Leaf blades glabrous on abaxial surface............................................................................................................................................6.

5. Leaf blades rotundate, apex obtuse; midrib and lateral nerves strongly raised on lower face; rusty brown with domatia along the lateral nerves..................................................................................................................................................................... E. montanus

- Leaf blades oval, apex obtuse or short-acuminate; domatia absent .............................................................................. E. subvillosus

6. Leaf margins revolute; sepal brownish green colour; midrib smooth prominent yellow; fruit globular green ....... E. mahamayensis

- Leaf margins not revolute (rarely revolute in E. taprobanicus ); sepals red to brownish red; fruit globular green to red.................7.

7. Leaf apices are obtuse to rounded, not narrowed into a short blunt point at the extreme apex; outer surface of petals sparsely to medium densely hairy throughout the undivided part................................................................................................ E. taprobanicus

- Most leaf apices acute to obtuse, usually narrowed gradually or abruptly in to a short, blunt point; outer surface of petals glabrous or only sparsely hairy in lower half to third of undivided part..........................................................................................................8.

8. Leaves coriaceous, obovate (never almost elliptic); Inflorescence axis often over topping upper most leaves; bracts often persistent to anthesis ........................................................................................................................................................................ E. coriaceus

- Leaves chartaceous, narrowly to broadly elliptic or slightly obovate; Inflorescence axis below the upper most leaves; bracts earlycaducous ............................................................................................................................................................................................9.

9. Inflorescence 15–25 flowered; sepal 3–4.5 mm long, petals 3–5.2 mm long with 17–22 divisions; stamens 16–1 smooth globular stone .................................................................................................................................................................................. E. amoenus

- Inflorescence 9–15 flowered; sepal 4.5–6 mm long, petals 5–7.2 mm long with 25–32 divisions, stamens 30–35, rough stone....... ........................................................................................................................................................................................ E. hedyosmus