MACROSCOPIC AND MICROSCOPIC CHARACTERS OF PLANTS. 



829 



is identical with that of C. villosum, but the width is 

 greater than in either parent. (Table J 58.) 



In C. villosum the color of the anterior sepal is yel- 

 lowish green with two narrow lines of brownish purple 

 extending along the 2 median veins. In C. insigne 

 maulei it is pale yellowish green with a few purple spots 

 arranged in lines at the base. In C. nitens it is yellowish 

 green, more greenish than in C. insigne maulei and more 

 yellowish than in C. villosum, with 2 rows of purple dots 

 over the veins at the base of a deeper purple than in 

 C. insigne maulei. 



The lateral petals are longer and wider in C. villosum 

 than in C. insigne maulei. In the hybrid the length is 

 greater than in either parent, the width is between those 

 of the parents, but nearer C. villosum. (Table J 58.) 



In C. villosum the petal is very much narrower at the 

 base than toward the apex, the apical width being about 

 three times the basal width. In C. insigne maulei the 

 apical width is greater than the basal width, but not so 

 great as in C. villosum. In the hybrid the dimensions 

 are between those of the parents, the apical width being 

 over twice the basal width. 



In C. villosum both margins are undulating; in 

 C. insigne maulei, the dorsal margin is crisped, the ven- 

 tral wavy ; and in the hybrid the dorsal margin is crisped 

 but not so much as in C. insigne maulei. While the 

 hybrid is between the parents in regard to this character, 

 it appears to be nearer C. insigne maulei than C. villosum. 



In C. villosum the petals are distinctly divided into 

 halves by the mid-line of reddish purple-brown. The 

 upper half is a darker brown, the lower half more green- 

 ish. The upper surface is hairy at the base. In C. 

 insigne maulei the petals are all yellowish-brownish- 

 green, with rather dull brownish-purple veins, the median 

 vein being somewhat more prominent at the base, where 

 hairs are present. In the hybrid the petals are glossy 

 yellowish-brown, with deeper brownish-red veins, espe- 

 cially the median veins which are darker at the base. 

 Hairs are present at the base. 



The labellum is longer and wider in C. villosum than 

 in C. insigne maulei. In the hybrid it is between the 



parents in length, but nearer C. m, and greater 



than in either parent in width. (Table J 58.) 



The color of the outer surface of the labellum in 

 C. villosum is yellowish green at the base, becoming 



brownish yellow anteriorly. In C. insigne maulei it is 

 paler green at the base, becoming pale brownish green 

 anteriorly, with slightly darker veins. In the hybrid it is 

 greenish yellow at the base (more yellowish than in C. 

 insigne maulei, and not as green as in C. villosum), 

 becoming greenish brown anteriorly, with brownish-violet 

 veins. 



The color of the inside of the labellum in C. villosum 

 is at the base pale yellow with purple hairs and red- 

 purple dots over the veins, becoming anteriorly greenish 

 with a faint suggestion of brownish violet, in C. insigne 

 maulei it is yellow at the base, with purple hairs and a 

 few dots over the veins, becoming brownish yellow an- 

 teriorly. In the hybrid it is pale yellow-green at the base, 

 with purple hairs and red-purple dots over the veins, be- 

 coming brownish-greenish-violet anteriorly, slightly 

 darker than in C. villosum, and with somewhat greenish 

 veins. 



The staminode is shield-shaped in all three plants, 

 the only difference in shape being that C. insigne maulei 

 does not have such a prominent apex as in 0. villosum 

 and the hybrid. In this character the hybrid is exactly 

 like the seed parent C. villosum. The size of the stami- 

 node is also identical in the hybrid and C. villosum, that 

 of C. insigne maulei being smaller. 



The width of staminode of C. villosum is 1.4 cm., of 

 C. insigne maulei is 1.1 cm., of C. nitens 1.4 cm. 



In color the staminode in C. villosum is olive-green, 

 with short purple hairs, and greenish tubercle ; in C. in- 

 signe maulei, yellow, with purple hairs, and yellow tu- 

 bercle; in the hybrid, orange-brown, with purple hairs, 

 and a deeper yellow tubercle than in C. insigne maulei. 



Comparisons of the Microscopic Characters. 

 Leaf. 



Sections of the upper epidermis were taken at the 

 apex, middle, and base of leaves of the same age. At the 

 apex, the upper epidermal cells are hexagonal in shape, 

 with a thick cuticle. The cell walls are thicker in C. 

 villosum than in C. insigne maulei, and fairly mid-inter- 

 mediate in thickness in the hybrid. The cells are only 

 slightly longer and narrower in C. villosum than in C. 

 insigne maulei, and smaller in the hybrid than in either 

 parent. (Table J 59.) 



At the middle of the leaf the cell walls are practically 

 identical in thickness in all three plants. The cells are 

 longer but narrower in C. villosum than in C. insigne 

 maulei; and in the hybrid between those of the parents 

 in length, but very much nearer C. villosum, while in 

 width they are less than in either parent^ being slightly 

 narrower than and much closer to C. villosum. (Table 

 J 59.) 



At the base of the leaf the cells of C. villosum are 

 larger than those of C. insigne maulei. In the hybrid 

 the size is between those of the parents, though much 

 nearer those of G. insigne maulei than 0. villosum. 

 (Table J 59.) 



The average size of the upper epidermal cells of the 

 whole leaf is greater in C. villosum than in C. insigne 

 maulei. Those of the hybrid are narrower than in either 



