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Microsporangia is a redirect to microsporangium

searching for Microsporangia 14 found (53 total)

Conifer cone (2,701 words) [view diff] exact match in snippet view article find links to article

microsporophylls (modified leaves). Under each microsporophyll is one or several microsporangia (pollen sacs). The female cone (megastrobilus, seed cone, or ovulate

Amelanchier (1,493 words) [view diff] exact match in snippet view article find links to article

one species (A. nantucketensis) often andropetalous (bearing apical microsporangia adaxially). The flowers appear in early spring, "when the shad run"

Isoetes (3,831 words) [view diff] exact match in snippet view article find links to article

megaspores and microspores, which develop in the megasporangia and microsporangia. These spores are highly ornate and are the primary way by which species

Abies balsamea (3,408 words) [view diff] exact match in snippet view article find links to article

rapidly and appear sooner than the female organs. The male organs contain microsporangia which divide to form sporogenous tissue, composed of cells which become

Degeneria (697 words) [view diff] exact match in snippet view article find links to article

filament, and connective, but instead are leaf-like, with two pairs of microsporangia embedded in the surface. There are three veins, rather than the single

Asterotheca (608 words) [view diff] exact match in snippet view article find links to article

magnified. F - Crossotheca. Fertile pinnule, bearing several tufts of microsporangia, magnified. G - Senftenbergia. Group of annulate sporangia, magnified

Salvinia (829 words) [view diff] exact match in snippet view article find links to article

few in number (approximately 10), each with single megaspore, or many microsporangia, each with 64 microspores. Spores are of two kinds and sizes, both globose

Ephedra aspera (361 words) [view diff] exact match in snippet view article find links to article

1/2 exserted, with 4--6 sessile to short-stalked (less than 1 mm) microsporangia. Seed cones usually 2 at node, ovoid, 6--10 mm, sessile or on short

Sporogenesis (1,018 words) [view diff] exact match in snippet view article find links to article

spores. In organisms that are heterosporous, two types of spores occur: Microsporangia produce male microspores, and megasporangia produce female megaspores

Pteris platyzomopsis (552 words) [view diff] exact match in snippet view article find links to article

is unusual among ferns in that it may display incipient heterospory. Microsporangia produce 32 microspores, each 71-101μm in diameter. Megasporangia produce

Lyginopteridales (1,990 words) [view diff] exact match in snippet view article find links to article

"Some Lower Carboniferous pteridosperm cupules bearing ovules and microsporangia." Transactions of the Royal Society of Edinburgh, 70: 1-11. Long, A

Canellaceae (3,202 words) [view diff] exact match in snippet view article find links to article

very large stamen numbers (20 to 40), are probably counts of thecae or microsporangia. Canellaceae has species in both xeric and wet forests. In Canella winterana

Selaginella selaginoides (696 words) [view diff] exact match in snippet view article find links to article

megasporangia in the lower part of the cone which produce megaspores and simple microsporangia in the upper part which produce many tiny microspores. It has a near-circumpolar

Conifer (5,796 words) [view diff] exact match in snippet view article find links to article

appearance of a cluster of berries. The male cones have structures called microsporangia that produce yellowish pollen through meiosis. Pollen is released and