MONOCOTYLEDONEAE 3 



sexual flowers. Flowers in spadices, unisexual, rarely hermaphrodite, 

 but then with a several-ovuled ovary 14 



14. Flowers monoecious ; male inflorescence, at least when young, separated 



from the female by a deciduous spathe. Flowers usually surrounded by 

 hairs. Ovule i, pendulous. Seed-coat not fleshy. 



Typha, 5. Typhaceae. 



Flowers hermaphrodite or unisexual ; if monoecious, then male inflorescence 



in uninterrupted connexion with the female, or separated from it by an 



empty interval or by barren flowers, but not by a spathe. Seed-coat 



fleshy 19. Araceae. 



15. (6.) Ovary superior 16 



Ovary inferior or half-inferior - 37 



16. Carpel sohtary or carpels connate and forming a single entire or slightly 



lobed ovary 17 



Carpels several, separate or cohering only at the base 33 



17. Perianth calyx- like, sometimes slightly coloured, but firmly membranous 



or leathery, or differentiated by size or coalescence into an inner and 

 an outer whorl of segments, all of which are sepaloid. ... 18 

 Perianth corolla-like or consisting of outer sepaloid and inner petaloid seg- 

 ments 25 



18. Leaves folded in the bud, subsequently splitting into pinnately or palmately 



disposed segments, rarely only 2-cleft. Stem woody, but sometimes 



very short. Flowers in spadices or panicles with spathes. 18. Palmae. 



Leaves undivided, rarely divided, but then not folded and springing from a 



herbaceous stem ig 



19. Flowers in spadices with a spathe forming sometimes a continuation of the 



stem 19. Araceae. 



Flowers not in spadices 20 



20- Stamen i. Ovule i, erect. Stigmas several. Flowers solitary or in 



glomerules in the axils of the leaves. . . . Naias, 9. Naiadaceae. 

 Stamens 2 — 6 21 



21- Anthers turned outwards. Ovary with i ascending ovule in each cell and 



with several sessile stigmas. Flowers hermaphrodite. Seeds exal- 



buminous Triglochin, 11. Scheuchzeriaceae. 



Anthers turned inwards. Seeds albuminous 22 



22. Anthers i-celled. Flowers unisexual, in spikelets usually arranged in spikes 



or panicles. Perianth dry. Stamens 2 — 3. Ovary with i pendulous 



ovule in each cefl 22. Restionaceae. 



Anthers 2-celled. If flowers unisexual and in spikelets, then perianth not 

 dry 23 



23. Flowers monoecious, in heads surrounded by an involucre. Ovary with 



I pendulous ovule in each cell 25. Eriocaulaceae. 



Flowers hermaphrodite, polygamous, or dioecious 24 



24. Style I with 3 long and thin stigmas. Perianth dry. Leaves linear. 



31. Juncaceae. 



