megasporangium
31mac|ro|spo|ran|gi|um — «MAK ruh spuh RAN jee uhm», noun, plural gi|a « jee uh». = megasporangium. (Cf. ↑megasporangium) …
32ovule — noun Etymology: New Latin ovulum, diminutive of Latin ovum Date: 1829 1. an outgrowth of the ovary of a seed plant that is a megasporangium and encloses an embryo sac within a nucellus 2. a small egg; especially one in an early stage of growth …
33Archegonium — Diagram of archegonium anatomy An archegonium (pl: archegonia), from the ancient Greek ἀρχή ( beginning ) and γόνος ( offspring ), is a multicellular structure or organ of the gametophyte phase of certain plants, producing and containing the ovum …
34Embryophyte — Land plants Temporal range: Late Silurian–Recent[1][2] (Spores from Dapingian (early Middle Ordovician) …
35Gynoecium — A gynoecium (from Ancient Greek gyne , woman ) is the female reproductive part of a flower. The male counterpart is called an androecium . A gynoecium is composed of one or more pistils. A pistil may consist of a single free carpel, or be formed… …
36Sporogenesis — is the production of spores in biology. The term is also used to refer to the process of reproduction via spores. Reproductive spores are formed in many eukaryotic organisms, such as plants, algae and fungi, during their normal reproductive life… …
37Evolutionary history of plants — Plants have evolved through increasing levels of complexity, from the earliest algal mats, through bryophytes, lycopods, ferns and gymnosperms to the complex angiosperms of today. While the simple plants continue to thrive, especially in the… …
38Plant evolutionary developmental biology — For a more ecological discussion on the evolution of plant morphology, refer to Evolutionary history of plants Evolutionary developmental biology (evo devo) refers to the study of developmental programs and patterns from an evolutionary… …
39Brachsenkräuter — See Brachsenkraut (Isoëtes lacustris) (A) Ganze Pflanze (1) Blattgrund mit Sporangium am Grund und Blatthäutchen darüber (2) Längsschni …
40Ginkgo — Älterer Ginkgobaum (Ginkgo biloba) Systematik Unterabteilung: Samenpflanzen (Spermatophytina) Klasse …
