Calantica, Jaub. ex Tul.

Applequist, Wendy L., Phillipson, Peter B. & Schatz, George E., 2014, A synoptic revision of the Malagasy endemic genus Calantica Jaub. ex Tul. (Salicaceae), Adansonia (3) 36 (1), pp. 83-102 : 85-86

KEY TO THE SPECIES OF CALANTICA JAUB. EX TUL.

1. Stamens equal in number to petals; sepal glands often with a corrugated or reticulate surface but not pubescent ........................................................................................... 2

— Stamens 3 or 5-6 times as many as petals; sepal glands densely short-pubescent on upper surface ........................................................................................................................ 6

2. Inflorescences cauliflorous, borne mostly on larger twigs and branches; sepals bearing prominent gland-tipped projections on margins ............................................................ ................................... 10. C. sphaerocephala Appleq., Phillipson & G. E. Schatz , sp. nov.

— Inflorescences all or mostly lateral, never cauliflorous on large stems; sepals lacking glandtipped projections on margins .................................................................................... 3

3. Flowers (8-) 10-15 mm in diameter; abaxial sepal surfaces pilose; ovary sparsely or apically pubescent to glabrate ....................................................... 6. C. grandiflora Jaub. ex Tul.

— Flowers (4-)5-7.5(-9) mm in diameter; abaxial sepal surfaces pubescent with very short erect trichomes or sericeous with upward-pointing trichomes; ovary densely pubescent throughout ................................................................................................................. 4

4. Shrub (tree); leaves narrowly elliptical (to elliptical), to 4.2 cm long, the apex acute (to slightly acuminate) with a rounded tip; stipules <0.5(-0.7) mm long; abaxial surface of sepals sericeous, usually densely; near Tolagnaro (extreme SE Madagascar)..................... ................................................................................................ 7. C. lucida Scott-Elliot

— Trees, rarely described as shrubby or lianoid; leaves elliptical to broadly elliptical, oblong, obovate, or oblanceolate, variable in size, the apex cuspidate to acuminate (atypically retuse, emarginate, rounded or acute); stipules> 0.7 mm long, sometimes several times longer; abaxial surface of sepals short-pubescent ......................................................... 5

5. Leaves elliptical to oblong, broadly elliptical, obovate, or oblanceolate, (1.5-) 4.5-17 cm long, usually drying to light to dark brown (or pale, mottled or discolored green); leaf apex cuspidate (to short-acuminate, retuse, emarginate, rounded or acute); inflorescences usually many-flowered ........................................................ 3. C. cerasifolia (Vent.) Tul.

— Leaves lanceolate to ovate or narrowly elliptical, 3-10.5 cm long, usually drying to pale olive drab adaxially, pale olive brown abaxially; leaf apex acuminate with a rounded tip; inflorescences (4-)8-20-flowered .................................................................................... ............................................... 8. C. olivacea Appleq., Phillipson & G. E. Schatz , sp. nov.

6. Stamens in groups of 5-6 per petal ............................................................................. 7

— Stamens in groups of 3, with 1 internal and 2 external ............................................... 8

7. Leaves 4-11 × 3-4.5 cm, the apices cuspidate; SE Madagascar ....................................... ................................................................................................ 2. C. capuronii Sleumer

— Leaves 1.2-3.4 × 0.6-1.3 cm, the apices rounded to obtuse; SW Madagascar ................. ............................................................................................. 5. C. decaryana H. Perrier

8. Shrub; leaf margins subentire; inflorescences 1-4-flowered; SW Madagascar .................. ............................................................................................... 4. C. chauvetiae Sleumer

— Tree; leaf margins serrate to crenate-serrate or serrulate; inflorescences mostly>4-flowered; W to NE Madagascar ................................................................................................. 9

9. Ovary densely white-puberulent, sparsely puberulent in fruit; styles <0.5 mm long; dry forest in W to extreme N Madagascar .................................... 1. C. biseriata H. Perrier

— Ovary dark, sparsely puberulent, becoming glabrate in fruit; styles 1.5-2 mm long; humid forest in NE Madagascar ............................................................................................... ................................. 9. C. pseudobiseriata Appleq., Phillipson & G. E. Schatz , sp. nov.