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A conifer cone, or in formal botanical usage a strobilus, pl.: strobili, is a seed-bearing organ on gymnosperm plants, especially in conifers and cycads. They are usually woody and variously conic, cylindrical, ovoid, to globular, and have scales and bracts arranged around a central axis, but can be fleshy and berry-like.
The female cones are from 11–17 cm (4.3–6.7 in) long, [4] larger and with thicker scales than those of other douglas-firs, and with exserted tridentine bracts. The seeds are large and heavy, 10 mm long and 8 mm broad, with a short rounded wing 13 mm long; [ 4 ] they may be bird or mammal dispersed as the wing is too small to be effective ...
Crossbills are specialist feeders on conifer cones, and the unusual bill shape is an adaptation which enables them to extract seeds from cones. These birds are typically found in higher northern hemisphere latitudes, where their food sources grow. They irrupt out of the breeding range when the cone crop fails. Crossbills breed very early in the ...
Landscapes, bark and cones with foliage Abies amabilis (Pacific silver fir) Can reach 230 ft (70 m) in height. The timber is lightweight, with low resin content. The species can easily be distinguished from non-fir conifers by the grey, blistery trunk and rigid branches. Uses: timber; landscaping, pulpwood, veneers, winter holiday decorations ...
The red crossbill is in the midst of an adaptive radiation into the niches presented by the various species of conifer. [12] There are about 10 North American and 18 Eurasian types so far identified, [13] with many known to affiliate with a particular conifer species or a suite of similar conifer species. While each type may be seen to feed on ...
The scales on butterfly wings are pigmented with melanins that can produce the colours black and brown. The white colour in the butterfly family Pieridae is a derivative of uric acid, an excretory product. [13] [40]: 84 Bright blues, greens, reds, and iridescence are usually created not by pigments but through the microstructure of the scales.
Subfamily Piceoideae : cones are annual, without a distinct umbo, the cone scale base is broad, concealing the seeds fully from abaxial view, seed is without resin vesicles, blackish, the seed wing holds the seed loosely in a cup, leaves have primary stomatal bands adaxial (above the xylem) or equally on both surfaces.
Butterfly knives in closed and open positions. A balisong, also known as a butterfly knife, fan knife or Batangas knife, is a type of folding pocketknife that originated in the Philippines. Its distinct features are two handles counter-rotating around the tang such that, when closed, the blade is concealed within grooves in the handles.