360 AUTUMN FLOWERS AND FllUlTS. 



Xt Corolla more or less irregular. 



18. Labiate plants — herbs ; corolla two-lipped ; stamens didyna- 



raous ; ovary four-lobed, the lobes one-seeded. 



Monochlamyds : Perianth single, consisting of a calyx only. 



19. Chenopodiaceous plants — herbs; perianth small, inferior; 



carpels solitary, one-seeded. 



ENDOGENOUS PLANTS or MONOCOTYLEDONS. 



Leaves with parallel veins. Flowers usually ternary — the 

 parts in threes Embryos with one cotyledon, hence Mono- 

 cotyledonous. This group includes Orders 20 to 24. 



* Flowers perfect, with a petal-like wJiorled perianth. 

 t Ovary inferior. 



20. Orchidaceous plants — herbs ; flowers six-leaved, irregular ; 



stamens and style united into a central column. 



tt Ovary superior. 



21. Liliaceous plants— herbs; flowers six-leaved, the segments 



sometimes combined, regular ; anthers turned inwards ; style 

 and ovaries consolidated. 



22. Melanthaceous plants — herbs ; flowers six-leaved, regular, 



long-tubed ; anthers turned outwards ; styles distinct ; 

 ovaries subterraneous in the flowering stage, separable. 



** Flowers glumaceous, or formed of imbricated colourless 

 scales, not truly whorled. 



f Ovary 2-S-celled. 



23. Eriocaulaceous plants — aquatic herbs, with spongy cellular 



leaves, and unisexual flowers in small crowded scaly heads. 



f f Ovary one-celled. 



24. Graminaceous plants— herbs, with grassy sheathing leaves, 



the leaves split on the side opposite the blade. 



