Aristolochia macrophylla Lam.

Aristolochiaceae


Morphology

liana 3m

Ecology

hill and mountain zone, medium site

Chorology

Eastern North America

Xylem

Distinct rings, ring porous, vessels solitary, vessel diameter 150-200mµ, simple perforation at the axial ends, round, partially with scalariform intervessel pitting, with few tylosis, fibers thin to thick-walled, fibers with bordered pits with slit-like apertures, parenchyma apotracheal and partially mariginal, vascular bundle form remaining but with secondary rays, rays very large, locally with sheet cells, ray cells unlignified with square cells. With crystal druses.

Xylem-Code

See annex

Phloem

Phloem simple structured. Tangential layers of collapsed cells, distinct ray dilations. Cortex with fragments of an earlier sclerenchymatic belt. Fiber tracheids in the cortex. Thick phellem.

Explanations

For explanations please see the Feature Characteristics.

Cross section
    
Tangential section
   
Radial section
  
Bark
  

© 2005 WSL - F. Schweingruber, W. Landolt, last update 18.11.2010