Il6 19. ARACEAE 



10. Stem creeping. Leaves lanceolate, parallel- veined, with numerous pri- 



mary and secondary lateral veins. Ovary completely or incompletely 

 2 — 3-cclled with numerous ovules. — Species 12. West Airica. [Tribe 



ANUBIADEAE.] Anubias Schott 



Stem erect or tuberous. Leaves ovate ovate-sagittate or dissected, net- 

 veined, rarely parallel-veined with 5 primary lateral nerves. . . 11 



11. 0\'ules I — 3. Spadi.x with barren flowers below and above the male ones. 



Stem short, ascending. Leaves ovate or sagittate, entire, with about 

 5 primary lateral nerves and many parallel secondary ones. — Species 

 2. Madagascar and neighbouring islands and Zanzibar. They yield 

 fibre and edible tubers and seeds and are used in medicine. 



Typhonodorum Schott 



Ovules 4 or more. Leaves sagittate- or cordate-ovate and net-veined, 



or dissected 12 



12. Ovules 4. Female flowers with staminodes. Spadix with a terminal 



appendage. Stem tuberous. Leaves dissected. — Species i. Seychelles. 



[Tribe PROTAREAE.] Protarum Engl. 



Ovules more than 4. Leaves sagittate- or cordate-ovate. [Tribe COLO- 

 CASIEAE.] 13 



13. Ovary completely i-celled. Ovules straight or almost so 14 



Ovules incompletely 2 — ^3-celled. Ovules inverted. Spadix without a 



terminal appendage 16 



14. Ovules few, basal. Stem erect. Spadix with a terminal appendage. — 



Species i. Cultivated and sometimes naturahsed in Madagascar and 

 the neighbouring islands. Stem and leaves are edible ; also used as an 



ornamental plant Alocasia Schott 



Ovules many, parietal. Stem tuberous 15 



15. Spadix with a terminal appendage. Spathe erect. Stamens 3 — 6. — Species 



I (C. antiquorum Schott, taro or dinde). Cultivated and sometimes 

 naturahsed in Tropical and North Africa. The tubers and leaves are 

 eaten and used in medicine ; also an ornamental plant. (Under Cala- 



ditim Vent.) Colocasia Schott 



Spadix without an appendage. Spathes recurved at the top. Stamens 

 2 — 3. — Species i. Island of Socotra. Used as an ornamental plant. 



Remusatia Schott 



16. Style disc-like, adnate to the styles of the neighbouring flowers. Ovules 



with a long funicle. Leaves leathery. — Species 2. Cultivated and some- 

 times naturalised in West Africa and the Mascarene Islands. Used as 



ornamental plants or vegetables Xanthosoma Schott 



Style none. Ovules with a short funicle. Leaves herbaceous, usually 

 with red spots. — Species i. Cultivated and sometimes naturalised 

 in West Africa. Used as an ornamental plant. . Caladium Vent. 



17. (8.) Stem above ground and usually climbing or undergroimd and creeping. 



Spadix without an appendage. Ovary i— 2-celled with i ovule in each 



cell 18 



Stem underground, short and thick, more or less tuberous. Juice milky. 23 



