leaf scars

Listing 1 - 10 from 90 for leaf scars

Sigillaria leaf scars
Sigillaria leaf scars Syringodendron The circular structures on this sigillaria specimen are traces of vascular bundles (veins) that serve the leaves. The surface of this specimen has been eroded (decorticated) which results in these structures (parichnos_) appearing abnormally large. Sigillaria specimens of this type are assigned to the form genus syringodendron. A 1/16-inch layer of coal covers ...
www.clearlight.com

Sigillaria leaf scars
Sigillaria leaf scars Syringodendron (Specimen I.D. WV-98a) Rock Type: Sandy shale Formation: Kanawha Interval: Coalburg seam Age: Middle Pennsylvanian Period, approx. 307 million years. The double scar structures on this sigillaria _specimen are the result of partial erosion (decortication) of the trunk. Sigillaria specimens of this type are assigned to the form genus syringodendron. Location: ...
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Palm wood with large leaf scars
Palm wood with large leaf scars Back Piece of palm wood with large leaf scars. Height 30 cm. Finding place: Holterbeek (NL). Coll. Huis Bergh, 's Heerenberg.
www.xs4all.nl/~steurh

Botanical CDs
... "interactive twigs." These "twigs" are interactive in that the user can go from views of a whole winter twig to detailed views of leaf scars, cross sections and buds . It is a teaching resource developed for our undergraduates in Dr. Michael Adams' woody plant course which we make available to you. The cost for one copy is $20.00. If you choose the ...
botit.botany.wisc.edu

CCE - Suffolk County: Propagation of Houseplants
... commonly called stem cuttings or slips. Sedum, Echeveria and Sansevieria are commonly propagated by rooting an entire leaf from which new plants will develop. Sansevieria and palmleaf begonia leaves can be cut into sections, ... the base of the plant after the older leaves drop off is cut into sections. Between the circular rings or leaf scars are dormant buds. The cane is cut with at least two leaf ...
counties.cce.cornell.edu

Pine, Spruce or Fir?
... at the apex. They are spirally arranged on the twigs, but often appear to be two-ranked, particularly on the lower branches. The twigs are smooth, and after the leaves are shed, marked with tiny, circular leaf scars. Sustainable horticultural information, offered free of charge to the public with the support of the University of Saskatchewan Extension Division ...
gardenline.usask.ca

The Virginia Camellia Society - Education - Disease Problems of Camellias
... caused by the fungus Glorerella cingulata. This fungus usually requires a wound to enter the plant. Leaf scars, hail injury and wounds created from lawn mowers, pruning cuts, falling branches and insects are ... or physically removed. Spraying of plants with a fungicidal solution in the spring during the normal leaf-fall period will help to prevent the spread of the fungus. Root rot: Camellia root rot ...
members.cox.net

Green Apple Aphids, HYG-2206-94
... on fruit can lower fruit quality and marketability. Green apple aphid is usually found feeding on the leaf undersurface, close to major veins, on young terminal leaves in early-summer. Further infestations can develop on ... apple grain aphid. Overwintering eggs of green apple aphid are found at the base of buds and leaf scars on terminal shoots and water sprouts. Most eggs can be found 15-20 cm (6 ...
ohioline.osu.edu

Blackleg, Aerial Stem Rot, and Tuber Soft Rot of Potato, HYG-3106-95
... to the seed piece. Stem infection can occur through wounds or through natural openings such as leaf scars. Lesions on diseased stems first appear as irregular brownish to inky-black areas. These ... crop growth, monitor irrigation and nitrogen fertility to minimize excessive vine growth that will promote leaf wetness within the plant canopy. Harvest tubers only after the vines are completely dead to ...
ohioline.osu.edu More from this site

Leaf Spot
... none on the last flush of growth in late summer. Symptoms and Disease Cycles Gloeosporium Leaf Spot or Anthracnose (Gloeosporium minus) Most commercial blueberry plantings in eastern North Carolina are affected ... first appear on current season's growth as dark red circular to elliptical lesions around leaf scars. As the lesions enlarge, the affected stems turn brown and eventually become gray and ...
www.ces.ncsu.edu