sterile pinnae

Listing 1 - 10 from 19 for sterile pinnae

ACROSTICHACEAE [First Draft]
... pinnae fertile only. Lamina 1-pinnate, firmly herbaceous, chartaceous, or coriaceous, glabrous on both surfaces; sterile pinnae lanceolate or tough-shaped to elongate-oblong, obtuse or acuminate at apex, entire at margin; fertile pinnae ... Sterile pinnae rounded, truncated, or retuse and shortly mucronate at apex ---------------------------------------------- 1. A. aureum 1b. Sterile pinnae narrowly ...
hua.huh.harvard.edu

Adiantaceae [First Draft]
... entire at upper margines or sterile pinnules and fertile pinnules in sterile parts with triangular blunt theeth or undulately crenate-raised at upper margines; pinnae herbaceous.     ... entire, upper margins rounded, fertile pinnae with 2-5 shallow sinuses, denticulate on sterile parts; sterile pinnae denticulate on upper margins; upper pinnae and terminal pinnae all same shape with lower ones ...
hua.huh.harvard.edu More from this site

The Cycad Pages
... to spherical with 1-7 leaf-bearing branches, largest leaves with less than 11 pinnae 1. B. spectabilis Description: Habit: dioecious fern-like shrubs with a naked subterranean ... hairs. Microsporophylls: spirally orthostichous, aggregated into male cones and each with a simple, peltate sterile apex, which is not produced into a terminal spine. Each microsporophyll bearing numerous microsporangia ...
plantnet.rbgsyd.nsw.gov.au

The Cycad Pages
... of the protologue or original description pertaining to the name. Pinnae 15-25 cm long, 30-50 mm wide -- Chigua restrepoi Pinnae 30-35 cm long, 10-15 mm wide -- Chigua bernalii ... coloured hairs. Microsporophylls: spirally orthostichous, aggregated into stalked male cones and each with a simple sterile apex, which is flattened or faceted, weakly bilobed, never produced into an upturned spine. Each ...
plantnet.rbgsyd.nsw.gov.au More from this site

Images accompanying the Flora of Roosevelt
... pinnae fertile pinna sporangia on pinnula of otherwise sterile frond sporangia magnified Polypodium virginianum frond (drought stressed) pinnae sori sori magnified Polystichum acrostichoides frond sori sori magnified pinnae ...
pluto.njcc.com

Vegetative Terminology (Part 2)
... similar in appearance to the cultivated date palm (P. dactylifera). The basal leaf segments (pinnae) are modified into stiffs pines. Like sharp-pointed daggers, they are a hazard when ... Vegetative propagation by cloning is a good adaptation since populations of this cactus are often sterile. Center: Buckhorn cholla (O. acanthocarpa), another Opuntia with cylindrical stem segments. The spine clusters ...
waynesword.palomar.edu

Hardy Ferns:
... rigid, more erect, constricted at tip and die in winter; sterile fronds are smaller and less erect and remain evergreen; pinnae are auricled with marginal bristle teeth; stipe and rachis are scaly ...
www.ces.ncsu.edu

Hardy Ferns:
... Zones: 3-9 Image Not Posted Height: 8 to 20" Deciduous/Evergreen: Evergreen Fronds: Slender, sterile fronds are arching to flattened and light green; fertile fronds stand upright and are dark ... at both ends; shiny dark stems and axis; 18 or more pairs of non-opposite pinnae Comments: Creeping, crown forming rhizome; require moist, well drained, humus rich to rocky soil in ...
www.ces.ncsu.edu More from this site

Fern notes
... stout central petiole, part of which forms the rachis from which arise the leaflets or pinnae. B. The arrangement of the vascular tissue in ferns is highly variable, but distinct for ... the apex. Antheridia are formed first, and are small - consisting of only 3 or 4 sterile jacket cells surrounding 32 sperm. Archegonia are formed later, closer to the notch and are ...
www.cs.cuc.edu

Cycad Society SA: Encephalartos inopinus
... leafbase and consequently have a much shorter petiole. Although teeth are normally absent from the pinnae margins, occasionally minute teeth are found on the lower leaflet margins towards the apex. Leaflets ... being more-or-less the same size throughout the cone with only the few smaller sterile apical scales being smaller. The cone bulla and facet surfaces give a striking geometrical appearance ...
www.cycadsociety.org

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