phanerophyte


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phanerophyte

a woody plant bearing buds more than 25 cm from the ground.
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Les therophytes occupent les 45,1%, les chamephytes (26,8%), les hemicryptophytes (19,7%), les geophytes et les phanerophytes (4,23%).
The life forms of the specimens were classified according to Raunkiaer (1934), excluding epiphytes and considering succulents separately from phanerophytes.
A phanerophyte from the eastern Mediterranean and North Africa, Tamarix parviflora is widely cultivated as an ornamental in other parts of the world.
Among which chamaephyte, a perennial plant that sets its dormant vegetative buds just at or above the surface of the ground; geophyte, a perennial plant that propagates by underground bulbs or tubers or corms; phanerophyte, the surviving buds or shoot apices are borne on shoots which projected into the air.
November 2002 (early rainy season), Ph = phanerophyte, Ch = chamaephyte, H = hemicryptophyte, Cr = cryptophyte and Th = therophytes.
Hemicryptophytes (62 taxa) and Geophytes (23 taxa) are also quite well represented, whereas Chamaephytes (12 taxa), Phanerophytes (9 taxa) and Hydrophytes (11 taxa) occur in lower percentages.
These last two, which are the most genuine deserts, show significant differences in biological types, with a greater presence of therophytes and an almost total absence of phanerophytes and chamaephytes.
The life form spectrum of the vascular flora indicates the predominance of therophytes (52%), with hemicryptophytes (15%) and phanerophytes (10%) (Figure 4).
The life form spectrum of the recorded species showed the prevalence of theorphytes (37%) followed by chamaephytes (32%), geeophytes (13%), hemicryptophytes (10%) and Phanerophytes (8%).
Proposed by Raunkiaer (1934), the system classifies plants according to forms used to protect their perennating buds during unfavorable seasons, and groups them into five main classes: therophytes, cryptophytes, hemicryptophytes, chamaephytes and phanerophytes, according to their different resistance strategies to environmental conditions.
Then the Hemicryptophytes, helophytes, geophytes Phanerophytes Chamephytes, hydrophyte life forms constitute the next.
The Cryptophytes and Phanerophytes life forms were dominated in the herbal and regeneration layers, respectively (Table 1).