phloem absent

Listing 1 - 8 from 8 for phloem absent

Angiosperm Families - Implicit Attributes
... absent. Medullary bundles absent. Internal phloem absent. The secondary phloem not stratified. Xylem without tracheids; without fibre tracheids; without libriform fibres; with vessels. Tile cells absent ...
delta-intkey.com

Angiosperm Families - Acanthaceae Juss.
... absent. Medullary bundles present (rarely), or absent. Internal phloem present, or absent. Secondary thickening developing from a conventional cambial ring. ‘Included’ phloem absent ...
delta-intkey.com More from this site

APSnet Education Center - Introductions to the Major Pathogen Groups - Introduction to Parasitic Flowering Plants
... are thus nonphotosynthetic) and must rely totally on the contents of the xylem and the phloem of the host. All holoparasites are obligate parasites. Although these definitions imply absolute and ... Phoradendron actually translocate photosynthates back into the host during the winter when host leaves are absent. In contrast, Arceuthobium (dwarf mistletoe) produces very little of its own food as an ...
www.apsnet.org

Bananas and plantains
... in Asia, to supplement a fish diet (protein). Unfortunately, early accounts of banana are absent. The oldest records of edible bananas come from India (600 B.C.), described in ... wiped out virtually overnight by Panama disease, a fungus (Fusarium oxysporium cubense), which attacks the phloem. Fortunately, some banana clones showed resistance in the field, and growers reestablished plantations with ...
www.botgard.ucla.edu

MBG: Research: Projects: South America: Venezuelan Guayana
... -16 phloem arms; capsule with midline barely or not at all evident; seeds with brownish wings; interpetiolar glandular fields absent ..... 40 39. Stem cross section with 4 phloem arms; capsule with raised midline; seeds with the wings (except Paragonia) usually hyaline-membranous or absent; interpetiolar glandular fields present or absent ...
www.mobot.org

Pinus contorta Dougl
... locally (37). Serotinous cones are not common in eastern Oregon, rare in coastal populations, and absent in the Sierra Nevada and southern California and Baja California populations (20). Although common in ... in July or August, introducing bluestain fungi (8). The beetles construct egg galleries in the phloem where larvae feed and together with the fungi, girdle and kill the tree. Larvae overwinter ...
www.na.fs.fed.us

Ceitis occidentalis L
... restricted to well-developed river valleys, north slopes, and protected ravines, and it is largely absent from windswept parts of the western river valleys. It is common in eastern Iowa on ... unique, along with a few other genera, in that a primary structure of the root phloem is stereome (sclerenchyma and collenchyma collectively). Stereome seldom develops in roots and when present is ...
www.na.fs.fed.us More from this site

Chapter 3: Taxonomy, Page 1
... sand). Minor leaf veins without phloem transfer cells (Chamaerops). Vessels present; end-walls scalariform. Stem anatomy. Secondary thickening absent (or slight, and then not ... Alkaloids present (occasionally, pyrimidine), or absent. Proanthocyanidins present (usually, abundantly), or absent (e.g. Livistona); cyanidin. Flavonols present (rarely), or absent; when present, kaempferol and quercetin ( ...
www.plantapalm.com