microphyllous


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Related to microphyllous: megaphyll

microphyllous

[¦mī·krō¦fil·əs]
(botany)
Having small leaves.
Having leaves with a single, unbranched vein.
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We established sampling plots in two different plant communities: desert microphyllous and desert rosetophyllous scrublands.
In experiments 1 and 2 the percentage loss of the microphyllous litter was significantly greater than for the mixed mesophyllous litter within LEM plots, but this was not the case for within-HEM plot comparisons [ILLUSTRATION FOR FIGURE 14 OMITTED].
Equisetum species also have small microphyllous leaves that are arranged in true whorls (Rutishauser, 1999) and the leaves of each whorl are fused together to form a cylindrical sheath around each node (Hauke, 1993) (Fig.
The most widespread zonal vegetation is that of the microphyllous desert, a desertscrub that flourishes on regosols and on Quaternary coarse alluvial plains and lower bajadas.
This reduction is taken to extremes in microphyllous plants, as in the ephedras (Ephedra spp.) and several halophilous chenopods such as the glassworts (Arthrocnemum, Salicornia) and saltworts (Salsola), in which the leaves have been reduced to scales and photosynthesis is performed by the stems.
This last principle involves the origin of the microphyllous leaf of the Lycopsida.
Nine different ecological zones have been defined within the reserve, including varied plant communities such as scrub with dominant or subdominant microphyllous shrubs like gobernadora (Larrea tridentata, Zygophyllaceae) and open scrub of sabaneta or tobosa grass (Hilaria mutica) and zacaton grass (Sporobolus airoides).
Serpentinicolous vegetation is spiny and microphyllous or sclerophyllous and forms islands in the middle of the basophilic, seasonal evergreen, or the semideciduous vegetation that grows on the limestone soils most common on the island.
Living conifers tend to have needle- or scale-like leaves containing a single vascular strand, but we find similar leaves in microphyllous plants.