Weinmannia

Bradford, Jason C. & Miller, James S., 2001, New taxa and nomenclatural notes on the flora of the Marojejy massif, Madagascar. V. Cunoniaceae: Weinmannia, Adansonia (3) 23 (2), pp. 219-236 : 220-221

Key to the species of Weinmannia at Marojejy

1.Pedicels distinct, easily visible and slender; seeds with surfaces more or less evenly (sect. Inspersa) .......................................................................................................................................... 2

1’.Pedicels lacking, very short, or thick as if an extension of the receptacle; seeds usually more or less covered with trichomes throughout (sect. Spicata ) ................................................................ 5

2. Inflorescence Modules (IMs, i.e. compound racemes or spikes) equal in size at different nodes, unbranched, terminating in a bud; flowers at maturity positioned away from the floral bract; floral bract subtending a single flower .......................................................................................................................... W. lowryana

2’.IMs unequal in size at different nodes, larger basally than distally, branched or not, or in a bud; flowers at maturity positioned near the floral bract; floral bract subtending a group of flowers or a solitary flower ........................................................................................................................................ 3

3. Floral bracts each subtending a group of flowers, IM usually well-branched .............................. W. venusta

3’.Floral bracts each subtending a solitary flower or occasionally a group of flowers, IM branched .................................................................................................................................................. 4

4. Leaves usually 3-foliolate, leaflets c. 1 cm long .................................................................. W. hepaticarum

4’. Leaves usually 5-foliolate or more, leaflets usually greater than 1 cm long .......................... W. rutenbergii

5.Floral bracts subtending multiple flowers (but not usually in the axil of a bract sometimes easily broken into segments .................................................................................................... 6

5’.Floral bracts subtending solitary flowers (but not usually in the axil of a bract at usually entire and membranous................................................................................................................7

6.Leaves with 5 or more small leaflets, usually less.................................... than 2 cm long W. marojejyensis

6’. Leaves with up to 5 larger leaflets, usually greater than 2 cm long ................................ W. rakotomalazana

7. Leaves unifoliolate, never compound ........................................................................................................ 8

7’. Leaves compound, occasional some unifoliolate leaves present................................................................11

8. Plant a sparsely-branched, erect shrub; ovaries glabrous .................................................... W. humbertiana

8’. Plant a densely-branched tree or shrub; ovaries pubescent ........................................................................ 9

9. Leaves entire or nearly so, margin serrate only along apical portion.................................... W. integrifolia

9’. Leaves serrate along most of margin ........................................................................................................ 10

10.Flowers densely packed along axis of spike so that rachis is not.......................... easily visible W. bojeriana

10’. Flowers sparse along axis of spike, rachis easily visible .......................................................... W. pauciflora

11. Leaves mostly 3-foliolate ........................................................................................................................ 12

11’. Leaves mostly 5-foliolate or more .......................................................................................................... 15

12. Leaves 2.5-4 cm long, glabrous .......................................................................... W. humblottii var. anceps

12’. Leaves greater than 4 cm long (usually 6-12 cm), glabrous or pubescent ................................................ 13

13. Leaflets serrulate, apex obtuse .................................................................................................... W. venosa

13’. Leaflets serrate, apex acute ...................................................................................................................... 14

14.Secondary veins decurrent along midvein, bifurcating c. 1/2 to 2/3 the distance to the margin, 45° angle with the midvein, vein branching to 4 orders .................................................... W. stenostachya

14’.Secondary veins not decurrent along midvein, bifurcating c. 2/3 to 3/4 the distance to the margin, c. 65-80° angle with the midvein, vein branching to 5 orders .................................................... W. arguta

15. Leaves usually with more than 9 leaflets ........................................................................ W. sanguisugarum

15’. Leaves with less than 9 leaflets ................................................................................................................ 16

16.Leaflets mostly elliptic, apex acute, margin toothed throughout; ovaries...................... glabrous W. decora

16’. Leaflets obovate, apex obtuse, margin of lower half not toothed; ovaries pubescent .... W. humblottii var. anceps