. Plant studies; an elementary botany. Botany. I'.ts PLANT STUDIES surface of the globular, cylindrical, or flattened stems (see §:!r,). 14(1. Hairy coverings.âA covering of bail's is an effective sun screen, and it is very common to find plants of xeropbyte regions character- istically hairy (see §35). ' The hairs ;ire dead struc- tures, and within them there is air. This causes them to reflect the light, and hence to ap- peal' white or lu'arlj' so. This reflection of light l(y tliehairsdimin- ishes the amount wliii'h reaches the working region of the plant (see Fig. 174). 141. Body habit.
. Plant studies; an elementary botany. Botany. I'.ts PLANT STUDIES surface of the globular, cylindrical, or flattened stems (see §:!r,). 14(1. Hairy coverings.âA covering of bail's is an effective sun screen, and it is very common to find plants of xeropbyte regions character- istically hairy (see §35). ' The hairs ;ire dead struc- tures, and within them there is air. This causes them to reflect the light, and hence to ap- peal' white or lu'arlj' so. This reflection of light l(y tliehairsdimin- ishes the amount wliii'h reaches the working region of the plant (see Fig. 174). 141. Body habit. âBesides tlie va- rious devices for diiiiiuiKbing ex- ])Osure or leaf sur- face, and iience 1 II ss of water, enumerated above, the wliole habit of tlie plant may em- phasize the same ])urp(isc. In dry regions it is to lie observed that, dwarf growths jn'cvail, so tliat the plant as a. whole does not present such an exposure to tlie dry air as in regions of greater moisture (see Fig. 175). Also the pros-. Fl(^. T\V(i plants of accjiinium scourini; rush (Erpii- â â <(fillu)^ showing the effect of cliviroiiiiient ; the Ions, iinbranched one having grown in normal megophyte conditions ; the short, bnshy branching, more slender form having grown on the dunes (scropliyte condi- tions).âAfter Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Coulter, John Merle, 1851-1928. New York, D. Appleton and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbotany, bookyear1900
