. The grasses and grasslands of South Africa. Botany; Grasses. 56 Grassveld may consist of a fairly intimate mixture of several of them. A. appendiculatus is usually a mountain species and A. intermedium Tar. punctatus and A. pertusus, whicli agree in Laving the lower glume pitted, occur usually in the early stages of sub-seres, hut may be found in more stable Veld. The majority of the species belonging to the sub-genus Cymhopogon are taller and coarser and represent a tyj^e -which is either transitional to Forest or Scrub, or -u-hich forms a stage in the hydrosere. The commonest are the Dobo
. The grasses and grasslands of South Africa. Botany; Grasses. 56 Grassveld may consist of a fairly intimate mixture of several of them. A. appendiculatus is usually a mountain species and A. intermedium Tar. punctatus and A. pertusus, whicli agree in Laving the lower glume pitted, occur usually in the early stages of sub-seres, hut may be found in more stable Veld. The majority of the species belonging to the sub-genus Cymhopogon are taller and coarser and represent a tyj^e -which is either transitional to Forest or Scrub, or -u-hich forms a stage in the hydrosere. The commonest are the Dobo or Tambookie grasses nardus var. validua (isiQunga), a lemon- scented grass, .4. ductus and dregeanus (uQunga). A. dichvoos is an early flowering tall growing species often ruderal. ..4. cyinharius is similar but flowers late. Its variety lepidus { = A. tainha Torre and Harms) belongs to the In'dro- sere, being found aroujid the margins of Fig. 4.—Transverse Section of a portion of a leaf of Andropogon hirtiis (x about eO). The genus Andropogon, being a sub-tropical tyi^e, does not show the extreme xerophytism of the South Western and Western semi-desert species. The species have mostly spread- ing root systems, and tufted habit, growing in strong bunches or chimps. The innovation shoots are either extravaginal or intravaginal or both. The leaves are flat or folded condupli- cate. They agree fairly closely with the species here illus- trated .4. hirtua (see Fig. 4). Eidges are not prominent, but there is a very distinct midrib, with large water storage cells. The vascular bundles are more than half surrounded by chlorenchyma, and are not strongly girdered, but they have sclerenchyma both above and below. The thin-walled cells between the patches of sclerenchyma on the upper surface. 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
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, booksubjectgr
