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OF THE GEXUS nAPTlTA. 



223 



o£ Africa is a roniarkablo fact of distribution ; and It iri noteworthy that this 

 isolated s[)Ocios is not an exceptional or aberrant type, but closely related to 

 the West African B. spathaceay from Avliich it is separated by the whole width 

 of Africa and at least sixty degrees of longitude of ocean* 



J^escriptice Key to the Species. 



Section 1. BiiACTKOLAiirAt Oalyx 2-fjd. 



Iiidumeutnm of petioles and inflorescence rather tliiu and greyish. 

 Leaves narrowing- gradually to the puint, comparatively short- 



petiolcd. 

 Leaves lanceolate, nienibranous, more or less cnneate at the 



base, crowded^ 4 to 7 cm L B, racemosa. 



Leaves lanceolatej sub-cnriaceou.s, rounded at the base, 5 to 



7 cm. Indumentum rather thick 2. B. aipparidifoliti. 



Leaves obloiig-lanceolate to ovate-oblonfTj more or less 

 cuneatCj membranous^ 7 to 15 cm. Itacemea very 



shurtj pedicels capillary 3. B, Badcliffei. 



Leaves variable, broadly lanceolate to ovate, always more or 

 less cu.spidate, rounded or sub-cordate at the baso^ long- 



petiolcd 4. B, pohj<jalacea. 



Leaves Avith rather conspicuous parallel iierves (8-10) and 

 short petioles. Racemes sliort (2"5 cm.). Pods linear, 



velvety 6, B, Laitrentii, 



Indumentum denae and harsh ; leaves shortly petioled, hardly 



cuspidate ; inflorescence ample 6. B, muUiflora, 



Indumentum dense and velvety. 



Petals twice as lon^j as calyx; leaves ovate-lanceolate up to 



10 cm.^ membranous. Ilaceuics 10 cm 7. B, lleudelotiana. 



Petals not twice as long as calyx. 



Leaves oval^ with a cordate base^ rounded or with a sliort 



point, 4 to 8 cm. by 3 to 5. llacemes I'O to 3 cm. . , 8. B. bauf/weolenst't. 



Leaves oblong, 3 to 4 cm. Racemes 2 to 5 cm. Inflores- 

 cence and leaves with dense, yellow, villous liairs . . , . 9. B, iinrivellerea. 



Leaves lanceolatCj rounded or sub-cordate at tlie base^long- 



petioled, sub-coriaceous, 4 to 7 cm. Racemes 3 cm, . , 10. B. Zcnkeri 



As B. Zenl^erlj but racemes longer and petioles shorter . . . , \\, B, Lescrauxcaetii. 



Section 2. Dklauia. Calyx spathaceous. 



A. MiCBOBu.vCTEOLAT.T]. Uracte >les very small, often minute, reniforai, sub-orbicular or 



broadly ovate ; velvety or glabrous. (Oblong or liuear oblong in some forms of 

 B. leptobotrj/s and in /?. silvatica,) 

 L Glabrous or glabrescent trees or shrubs, 

 i. Flow^ers 1-5 in the axils of the leaves. 

 {a) Ovary glabrous. 



(a) Petals twice as long as the calyx. Pedicels slender, 



shorter than the petioles^ up to 10 mm. Leaves 



variable, 6 to 15 cm* Flowers solitarv or in 



pairs 12. B. nitUla, 



