MACROSCOPIC AND MICROSCOPIC CHARACTERS OF PLANTS. 



797 



Sections of the lower epidermis of the middle lobe 

 of the labellum were examined. The cells are large and 

 papillose in all three, but the papilke are smaller in 

 L. purpurata than in C. moss'uv. The papilla? of the 

 hybrid are between those of the parents in size, though 

 slightly nearer L. purpurata. (Table J 19.) 



The cells of the lower epidermis of the middle lobe 

 of the labellum are smaller in L. purpurata than in 

 C. mossiw and in the hybrid. The length is greater than 

 that of either parent and the width greater than iu L. 

 purpurata and almost as great as in C. mossiu;. (Table 

 J19.) 



Stomata are present on the lower epidermis of the 

 middle of the labellum. They are more numerous in 

 L. purpurata than in C. ntofixiir ; and in the hybrid, 

 while the number is between those of the parents, it is 

 much nearer L. purpurata than C. mossice. In L. pur- 

 purata 1 in 4 fields; in C. mossice 1 in 17 fields; in L.-O. 

 canhamiana 1 in 7 fields. 



Sections of the upper epidermis of the proximal part 

 of the labellum were taken from the center above the 

 veined area. The cells of L. purpurata are smaller than 

 those of C. mossice, flat (not papillose), and striated; 

 those of C. mossice are larger, distinctly papillose, and 

 striated, the stria? being rather dense at the top of the 

 papillae; those of the hybrid are not quite so long, but 

 broader, than those of C. mossice, and they are slightly 

 papillose and striated. (Table J 19.) 



COMPARATIVE SUMMAEY OF THE CHARACTERS OF THE 



HYBRID L^LIO-CATTLEYA CANHAMIANA AND 



ITS PARENT-STOCKS. 



The hybrid is found to be : 



(1) The same or practically the same as the seed 

 parent: In the width of the leaves; the length of the 

 column ; the shape of the epidermal cells, and the depth 

 of the epidermal cells in the transverse section of the 

 pseudobulb ; the depth of the cuticle on the lower epider- 

 mis on the transverse section of the leaf at the midrib 

 region ; the number of sclerenchyma strands beneath the 

 upper epidermis, and the number of strands beneath the 

 lower epidermis on the transverse section of the leaf at 

 the first main vein from the midrib ; the depth of the 

 epidermal cells on the transverse section of the flower- 

 stalk. 



(2) The same or practically the same as the pollen 

 parent: In the size of flower sheath; color of flower 

 sheath ; number of flowers ; length of dorsal sepal ; width 

 of upper epidermal cells at the middle of the leaf ; length 

 of lower epidermal cells at the apex of the leaf ; length 

 of sub-epidermal cells, and depth of sclerenchyma sheath 

 on the transverse section of the leaf at the midrib ; depth 

 of upper epidermal cells, width of cells of the first layer 

 beneath, and width of lower epidermal cells on the trans- 

 verse section of the leaf at the first main vein ; regularity 

 of cells of the hypodermis and width of hypodermal cells 

 on the transverse section of the flower-stalk ; width of 

 upper epidermal cells of the sepals ; length and width of 

 upper epidermal cells of the petals; absence of hairs on 

 the upper epidermal cells of the petals; width of the 

 lower epidermal cells of the median lobe of the labellum. 



(3) The same or practically the same as both 

 parents: In the chunii'lur of roots, thickness of leaves, 

 color of leaves, length of lubdlum. 



(i) Iitlcrnii'diu/i' : In the ridging of old pseudo- 

 bulbs 9 ; length of leaves ; length of flower-stalk $ ; 

 shape of lateral sepals; nectary at apex of sepals; diit'er- 

 ence in length between lateral and dorsal sepals; length 

 of lateral sepals 9 ; color of sepals; color of petals; 

 length $ and width 3 of petals; waviness of anterior 

 margin of labellum 9 ; cleft in anterior margin of label- 

 lum 9 ; color of base of labellum ; color of apical half of 

 labellum ; color of anterior face of column ; width of 

 column ; size of pollinea ; depth of first layer beneath the 

 epidermis $ ; thickness of walls 9 of first layer beneath 

 the epidermis on the transverse section of the pseudo- 

 bulb; length $ and width 9 = 3 of upper epidermal cells 

 of the leaf at the apex ; length 3 of the upper epidermal 

 cells of the leaf at the base ; while 3 of the lower epi- 

 dermal cells of the leaf at the apex; width 3 of the 

 lower epidermal cells of the leaf at the base ; amount of 

 elongation of the upper epidermal cells at the midrib, 

 the length of the epidermal cells at the midrib 9 , the 

 arrangement and size of the cells beneath the lower epi- 

 dermis on the transverse section of the leaf at the mid- 

 rib ; the depth of the cuticle on the upper epidermis, the 

 depth of the lower epidermal cells 9 , the depth of the 

 cuticle on the lower epidermal cells, the depth of the 

 cells beneath the lower epidermis 9 , and the width of 

 the cells beneath the lower epidermis 3 , and the diameter 

 of the sclerenchj-ma strands 9 beneath the upper epi- 

 dermis on the transverse section of the leaf at the first 

 main vein; the depth of the hypodermal cells 3 , and the 

 proportion of the phloem in the bundles on the trans- 

 verse section of the flower-stalk ; the size of the papillae 

 3 on the upper epidermis of the sepal ; the length 3 , and 

 width 9 , of the lower epidermal cells of the sepals ; the 

 number of hairs 9 on the lower epidermis of the sepals 

 3 ; the length of the papillae, and the number of stomata 

 9 on the upper epidermis of the petals ; the length of the 

 papillae on the lower epidermis of the petals ; the length 

 of the papilla? on the upper epidermis of the middle lobe 

 of the labellum 9 ; the length of papillae 9 and the num- 

 ber of stomata 9 on the lower epidermis on the middle 

 lobe of the labellum; the length of the papillae on the 

 upper epidermis of the proximal part of the labellum; 

 length 3 of the upper epidermal cells on the proximal 

 part of the labellum. 



(5) Higher than in either parent: In the length of 

 pedicles 3 ; width of the sepals 3 ; width of labellum 

 2 = 3; color of posterior face of the column 9 = 3; 

 depth of cuticle 9 = 3 on the epidermal cells on the 

 transverse section of the pseudobulb ; number of stomata 

 at the apex 3 , at the middle 3 , and at the base 3 , on the 

 lower epidermis of the leaf ; depth of cuticle 2 , on the 

 upper epidermis on the transverse section of the leaf at 

 the midrib ; the length 9 of the upper epidermal cells of 

 the sepals ; the number of stomata 9 on the lower epider- 

 mis of the sepal ; the length 3 , and width 9 , of the lower 

 epidermal cells of the petal; the number of stomata 9 

 on the lower epidermis of the petal; the length 3, 

 and the width 3 of the upper epidermal cells of the 

 middle lobe of the labellum ; the length 3 of the lower 

 epidermal cells of the middle lobe of the labellum; the 



