4 MONOCOTYLEDONEAE 



Style I with 3 thick or short stigmas or with a single stigma, or styles 3. 

 Perianth usually herbaceous 32. Liliaceae. 



25. (17.) Perianth corolla-like. Usually ovules inverted and embryo or its 



radicle placed next to the hilum, more rarely ovules straight and embryo 

 or its radicle remote from the hilum, and then albumen fleshy or carti- 

 laginous 26 



Perianth differentiated into calyx and corolla. Ovules straight. Embryo 

 small, remote from the hilum. Albumen more or less mealy . . 31 



26. Seeds with mealy albumen 27 



Seeds with fleshy or cartilaginous albumen 29 



27. Ovules 2 or more in each ovary-cell. Seeds with a large embryo enclosed in 



the albumen 29. Pontederiaceae. 



Ovule I in each ovary-cell. Seeds with a small embryo appressed to the 

 albumen. Perianth white or yellow 28 



28. Perianth-segments free or nearly so. Anthers opening lengthwise. Stig- 



mas 3. Fruit a berry. Stem climbing. Leaves scattered, ending in 

 tendrils. Flowers in panicles. . . Flagellaria, 21. Flagellariaceae. 

 Perianth-segments united below into a tube. Anthers opening by apical 

 pores. Stigma i. Fruit a capsule. Stem erect. Leaves all radical. 

 Flowers in heads M aschalocephalus , 26. Rapateaceae. 



29. Stamens 3. Ovule i in each ovary-cell. Perianth yellow. 



33. Haemodoraceae. 

 Stamens 6 or more, rarely 3, but then ovules 2 or more in each ovary-cell. 30 



30. Anthers opening at the apex. Stamens affixed to the perianth. Ovary 



adnate to the perianth at the base. Ovules numerous in each cell. 



Perianth blue. Leaves linear or lanceolate. Walleria, 34. Amaryllidaceae. 



Anthers opening lengthwise, rarely at the apex, but then stamens (at least 



some of them) and ovary free from the perianth. . . 32. Liliaceae. 



31. (25.) Ovary 2 — 3-celled. Fertile stamens 2 — 6. . 28. Commelinaceae. 

 Ovary i-celled, sometimes with incomplete partitions. Ovules numerous. 



Fertile stamens 3. Flowers in heads, short spikes, or umbels. . . 32 



32. Sepals 3, subequal. Anthers opening by a terminal lid. Staminodes none. 



Stigma I. Leaves scattered. Flowers in umbels. 



Mayaca, 23. Mayacaceae. 

 Sepals 3, very unequal, or 2. Anthers opening by longitudinal slits. Stami- 

 nodes 3. Stigmas 3. Leaves all radical. Flowers in heads or spikes. 



Xyris, 24. Xyridaceae. 



33. (16.) Leaves divided. Woody plants. Seeds albuminous. 18. Palmae. 

 Leaves undivided. Herbaceous plants 34 



34. Plants without green colour, growing upon mould. Leaves reduced to scales. 



Perianth of 6 petaloid segments. Seeds albuminous. 



Sciaphila, 15. Triuridaceae. 



Plants of green colour, growing in the water. Leaves well developed. 



Perianth of 6 segments differentiated into sepals and petals, or of i — 3 



segments. Seeds exalbuminous 35 



