The Classification of Flowering Plants, Volum 1

allied America anther apex appear arise arranged associated axil axis base bearing becomes bract bracteole branches bundles carpels cells characters closely cones consists contains cotyledon diagram Dicotyledons distributed divides division elongated embryo endosperm enlarged female fertile fleshy floral flower four fruit gametophyte genera genus grows growth habit inflorescence inner lateral layer leaf leaves less longitudinal male male flower Monocotyledons North nucellus nucleus occur oospore Orders origin outer ovary ovule pair perianth petals placentas plants pollen portion position present produced rarely reduced regarded remains represented rhizome root scales seed separated sheath shewing shoot short side similar simple single sometimes South species spike spikelet spring stalk stamens stem stigma structure style surface surrounded terminal tissue transverse Tribe tropical upper usually whorl widely