LEAVITT: TRICHOMES OF ROOT. 
311 
Fig. 65. 
Fig. 66. 
Fig. 67. 
Fig. 68. 
Fig. 69. 
Fig. 70. 
Fig. 71. 
Fig. 72. 
Fig. 73. 
Fig. 74. 
Fig. 75. 
Fig. 76. 
Fig. 77. 
Fig. 78. 
Fig. 79. 
Fig. 80. 
Fig. 81. 
Fig. 82. 
Fig. 83. 
Fig. 84. 
Fig. 85. 
Fig. 86. 
Fig. 87. 
Alopecurus occidentalis. Optical radial longisection of epidermal 
cells about 30 cells from the growing point. X 315. 
A. occidentalis. Trichoblasts (T, T) and hairless cells 0.1 mm. from 
the growing point. Radial longisection. X 315. 
A. occidentalis. Base of trichome and atrichomic cells in profile. 
X 315. 
Festuca arundinacea. Surface view of part of a cell row in the 
embryonic epidermis. Alternation of trichoblasts (T) and non- 
piliferous cells. X 300. 
Poa violacea. Base of trichome and fully elongated hairless cell, in 
profile. X 315. 
Monstera deliciosa. Young root-hairs in alternation with hairless 
elements, in profile. X 220. 
Commelina nudiflora. Optical longisection of epidermis and cap of a 
small rootlet. The first trichoblast at T. X 450. 
C. nudiflora. The epidermis immediately back of that represented 
in figure 71. X 450. 
C. nudiflora. Surface of the epidermis just back of the root-cap. X 
450. 
Lachnocaulon Michauxii. Superficial view of the epidermis near the 
growing point, about 40 cells from the apex. X 220. 
L. Michauxii. Young trichomes in surface view. X 220. 
L. Michauxii. Trichomes in surface view. X 220. 
L. Michauxii. Young trichome in radial section, x 420. 
Xyr is flexuosa var. pusilla. Trichoblasts and long cells in profile, 
in the younger fixed tissue, below the root-hairs. X 300. 
X. flexuosa var. pusilla. Surface of the root 2 mm. from the apex. 
Young trichomes, the hairs emerging laterally. X 300. 
X. caroliniana. Surface of two cell rows 0.25 mm. from the apex. 
The trichoblasts occasionally transversely divided, as at d. 
X 300. 
X. caroliniana. Oblique view of the surface of the root in the zone 
of young hairs. X 220. 
Anigozanthos pulcherrima. Part of a longitudinal cell row of the 
epidermis, beginning with the 12th cell from the apex, in super¬ 
ficial view. The first trichoblast at T. X 300. 
A. pulcherrima. Epidermal cells divided for the formation of tri¬ 
choblasts (as at T), in profile. X 300. 
A. pulcherrima. Surface of the epidermis at about the limit of the 
cap. X 300. 
A. pulcherrima. Trichoblast formed by the cutting off of one 
corner of the mother cell. X 300. 
A pulcherrima. Lateral position of the hairs. X 220. 
A. pulcherrima. Bases of a pair of trichomes. X 300. 
