FIGURE 4: Seedlings of Campomanesia pubescens with 120 days--eo: first pair with opposite phyllotaxy
venusta leaves exhibit opposite phyllotaxy
and are composed of two or three leaflets.
This explains the impact of phyllotaxy
and size of the tree to protect the individuals and facilitate the mating againstharsh climatic conditions by creating a specific microclimate (fig.
The oldest groups of this subtribe with a distichous phyllotaxy
In species of Scleria with the latter type of spikelet--considering each axis separately (the main axis and the branched paracladia)--, the phyllotaxy
pattern changes first from spiral (in the vegetative part) to distichous and then again from distichous to spiral.
, with possible values "alternate" or "opposite"
Terete, wings absent 6 Cuticle Striated 7 Trichomes covering Present, conical, unicellular 8 Glandular trichomes Present; stalk unicellular; head multicellular (4-cells) 9 Chlorenchyma Present 10 Collenchyma Present 11 Endodermis Indistinct 12 Pericyclic fibers Present 13 Phloem fibers Present in old stem only 14 Pith Often an angular hollow cells pitted in older stem Leaf structure 1 Phyllotaxy
Alternate 2 Shape Linear, lower / Oblanceolate, upper elliptic 3 Size 12-38 x 5-10 mm 4 Apex Obtuse-muronate 5 Surface Hairy Midrib 1 Outline in T.
In tropical understory species, morphological variation related to the efficient absorption of light is great, encompassing species with different patterns of phyllotaxy
, leaf sizes, types of crown, and plant architecture (Valladares, et al.
In the Pooideae in contrast, the distichous phyllotaxy
of the leaves continues into the inflorescence; the distichy of the primary inflorescence branches thus appears to be a synapomorphy for Pooideae (Evans, 1940).