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lateral veins

Listing 1 - 10 from 139 for lateral veins

Athyriaceae [First Draft]
... pair, upward the pinnae gradually smaller. The first basal acroscopic lateral veins of segments pinnated, the rest lateral veins simple or occasionally forked, terminating in emarginate teeth. ... costae grooved adaxially; veins pinnate in segments, visible on surfaces, a little protuberant adaxially, lateral veins 3--5 pairs, upswept, anadromic, simple, basal veins of basal segments frequently ...
hua.huh.harvard.edu

Dicksoniaceae [First Draft]
... either side of rachilla; pinnule-segments slight falcate, apiculate, margins crenulate to serrulate-serrate; veins free, fertile ones simple, sterile simple or forked; laminae subcoriaceous, upper surface deep green ... glabrous on both sides, except the hairy midrib; venation visible on both surface, free, lateral veins simple or forked. Sori 1-5 pairs on pinnule-segments; indusia bivalvate, outer ...
hua.huh.harvard.edu

HEMIONITIDACEAE [First Draft]
... 5—8 X ca. 3 mm, apex rounded. Veins obscure. Sori spreading along lateral veins, covered by scales. 2n = 58.    ... -pinnate). Pinnae 10—17 pairs, lanceolate or deltate-lanceolate, imparipinnate. Lateral pinnules 1—6 pairs, ovate or elongate-ovate, shortly ... cordate, apex obtuse; terminal pinnule as lateral ones but with longer stalk and often inequilateral. Veins obscure. Sori covered by hairs. ...
hua.huh.harvard.edu

Sinopteridaceae [First Draft]
... 9—18 cm, 3—4-pinnate proximally, with a long linear simple pinna at apex; lateral pinnae 10—15 pairs, basal pair slightly larger, oblong-lanceolate or deltate, with stalks 3 ... to 7 X 3 mm, somewhat adnate to costa, margins irregularly crenate, apex obtuse-rounded. Veins pinnate, lateral veins forked. False indusia interrupted, reniform or rounded-reniform, margins somewhat ciliate.    ...
hua.huh.harvard.edu

Bolbitidaceae [First Draft]
...    9b. Venation pattern regular, veins variously anastomosing; rachis wingless.       12a. 1-4 veinlets arising from either side of lateral veins uniting in sterile pinnae, leaves ... lowermost pinnae 1-10 mm stalked; veins pattern: veins forming a costal areole and several equally large distal areoles, 4-5 veins arising from each side of lateral veins anastomosing. Fertile leaves 40-120 cm ...
hua.huh.harvard.edu

Drynariaceae [First Draft]
... lateral veins.        4a. Plants 30--40 cm high; base fronds 3--5 x 2--4 cm; sori in one row between lateral veins ... to lateral veins, with free included veinlets. Sori in one row between costa and margin, close to costa, only one sorus between lateral veins, ... along costa and veins. Sori in one stright row between costa and margin, close to costa, one row between lateral veins. Sporangia often ...
hua.huh.harvard.edu

The Cycad Pages
... reflexed, horizontal ptyxis circinate. Leaflets with a single thick midrib and no lateral veins; stomata confined to abaxial surface in most species; individual ptyxis involute. Leaves pubescent ... shallowly pectinate regularly dentate obscurely dentate with (lateral spines) lateral spines mm long apical spine distinct from lateral spines not distinct from lateral spines apical spine mm long seeds ...
plantnet.rbgsyd.nsw.gov.au

The Cycad Pages
... , Southern Africa: Stangeria eriopus Distinguishing characters: Leaves pinnate Leaflets with a midrib and lateral veins Leaflets not articulated Sporophylls in vertical rows in cones Description: Habit: dioecious ... or prickles. Leaflets flat, penniveined, with a large midrib and numerous subparallel, bifurcating lateral veins and stomata on both surfaces. Leaves pubescent, at least when young, with ...
plantnet.rbgsyd.nsw.gov.au

The Cycad Pages
... no lateral veins germination platyspermic carpophylls multi-ovulate ovules ascending stipules absent leaflet vernation circinate Zamiaceae female sporophylls in cones leaflets with multiple branching veins ... vernation flat Stangeriaceae female sporophylls in cones leaflets with multiple branching veins germination radiospermic carpophylls bi-ovulate ovules inverted stipules present leaflet vernation ...
plantnet.rbgsyd.nsw.gov.au

The Cycad Pages
... erect or rarely reflexed, horizontal ptyxis circinate. Leaflets with a single thick midrib and no lateral veins; stomata confined to abaxial surface in most species; individual ptyxis involute. Leaves pubescent, at least ...
plantnet.rbgsyd.nsw.gov.au