THE MUSS^NDAS OP MADAGASCAR 65 



Calyx-lobes ovate-lanceolate, barely 5 mm. long 



usually o. Landia. 



Leaves long-acuminate, mostly over three times as 



long as broad 5. mauritiensis. 



Leaves rather small, mostly broadly oblanceolate, 



about two and a half times as long as broad 6. asperula. 

 Leaves oblanceolate, sparsely pilose above with longish 



red hairs, barely 5 cm. at longest 11. ramosissima. 



Leaves glabrous above, or punctate, except for obscure, 

 closely adpressed pubescence on veins. 



Corolla-tube over 6 cm. long 8. erectiloba. 



Corolla-tube not much over 4 cm. long. 



Leaves punctate above ; calyx-lobes mostly less than 



1 cm. long 9. punctata. 



Leaves not punctate above ; calyx-lobes nearly 2 cm. 



long in flower 10. hymenopogonoitles. 



Calyx-lobes subsetaceous for greater part of their length. 



7. Pervillei. 

 Pubescence on principal veins below spreading. 

 Flowers not sessile. 



Fruiting calyx-lobes attaining 2-2-5 cm. in length. 



Leaves less than 8 cm. long 12. arachnocarpa. 



Leaves over 15 cm. long 16. lyilosa. 



Fruiting calyx-lobes less than 1 cm., rarely over 1 cm. 

 long, then setaceous. 

 Leaves markedly scabrid above, with short hairs swollen 



at base 17. scabridior. 



Leaves not scabrid above. 



Leaves less than 6 cm. x 2-5 cm 13. Humhlotii. 



Leaves over 12 cm. x 6 cm 18. vestita. 



Flowers sessile or subsessile, solitary, or in a few-flowered 

 head. 

 Corolla-tube less than 5 cm. long, lobes less than 2 cm. 



14. inonantlia. 

 Corolla-tube over 8 cm. long, lobes nearly 3 cm. 15. fusco-pilosa. 



Note. — The species are arranged as far as possible in order of 

 their affinity. 



1. M. ARCUATA Poir. in Lam. Encycl. Meth. iv. 392 (1795). 

 Landia stelligcra et L. astrograiilia Comm. ex Hb. Mus. Paris. 

 Nom. vulg. " Caca poule" (Bouton). 



Madagascar : Forbes ! Gerrard, 18 ! Baron, 6822 ! Ilumblot, 

 197! Lijall, 288! Central: Baron, 570! 2472! 3692! 4767! 

 Nossi-be : seashore, Hildehrandt, 2911 ! Mbatourana, between 

 Tamatave and Antananarivo : Meller ! S. Marie Is. : Forbes ! 

 Mauritius : Ayres ! Bojer ! Bouton ! Garmichael, 9 ! Graham ! 

 Hilsenbenj £ Bojer \ Roxburgh I Sieber (Fl Maur.), 78! Thomp- 

 son ! Bourbon : Aublet ! Balfonr ! Commerson 1 Hardioicke ! 



The above do not differ essentially from the Continental speci- 

 mens (1913, 274). One or two of the Mauritius specimens show 

 signs of a pilose midrib on the under side of the leaves and of 

 hairs in lines on the corolla-tube ; but none can properly be 

 classed with my variety /i jmbescens (I. c. 274). 



31. arcuata is strikingly distinct from all the other Madagascar 

 species in its glabrous shoots, leaves and small flowers, as well as 



