MACROSCOPIC AND MICROSCOPIC CHARACTERS OF PLANTS. 



791 



transverse section of the root; the length of the upper 

 epidermal cells of the leaf at the apex ; the size of the 

 chromoplasts in the outer cells of the corolla tube. 



(3) The same or practically the same as both 

 parents: In the depth of the epidermal cells of the trans- 

 verse section of the stem ; the width of the upper epider- 

 mal cells of the leaf at the base. 



(4) Intermediate: In the shape of the cotyledons; 

 length of the midrib 2 , length of petiole 2 , and the angle 

 between the lobes of the cotyledons ; the distance from 

 the ground before the stem branches 3 ; shape of the 

 lamina of the mature leaf ; length of the lamina $ ; 

 length of the petiole 3 ; number of flowers on one flower- 

 stalk ; shape of the corolla limb ; color of the corolla tube ; 

 color of corolla limb ; shape of sepals ; color of anthers ; 

 color of filaments; shape of capsule; length of seeds 3 ; 

 relationship of peduncle to pedicel; waviness of upper 

 epidermal cell walls of cotyledons ; number of glands on 

 upper epidermis 3 ; waviness of lower epidermal cell 

 walls ; number of glands on lower epidermis 5 ; number 

 of cortex layers, grouping of pitted vessels, position of 

 largest vessels and width and distinctness of medullary 

 rays on the transverse section of the root; the diameter 

 of the sclerosed cells 2 ; the number of crystal cells in 

 intraxylary phloem in the transverse section of the 

 stem ; the number of stomata 2 , the number of glands 2 , 

 at the base ; the number of glands on the upper epidermis 

 of the leaf at the base ; the number of hairs, the stiffness 

 of hairs, the length of the papilla? along the veins 2 ; the 

 length of papilla; along the margin 2 , and the position of 

 the stomata and glands on the upper epidermis of the leaf 

 at the base : the number of glands on the upper epidermis 

 of the leaf at the apex ; the number of glands on the 

 lower epidermis of the leaf at the base ; the diameter of 

 the glands on the lower epidermis of the leaf at the 

 apex; the angle between the ridges 2 ; the outline and 

 the number of cortex layers in the transverse section of 

 the petiole ; the length of the epidermal cells 2 at the base 

 of the petiole ; the shape of the mesophyll cells of the 

 corolla limb ; the waviness of the cell walls and the thick- 

 ening at the angles of the lower epidermal cells of the 

 corolla limb ; the thickness and the waviness of the outer 

 cells of the corolla tube ; the length of multicellular 

 glands at the base of the filaments. 



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

 roots 2 ; extensiveness of root system 2 ; diameter of 

 stem 2 ; growth of stem 2 ; length of branches 2 ; num- 

 ber of leaves 3 ; width of lamina 2 ; firmness of texture 

 of lamina 2 = 3; duration of green leaves 2 = 3 ; re- 

 sistance to insects 2 = 3; length of flower-stalk 2 ; 

 length of corolla tarbe 3 ; diameter of corolla limb 2 = 3 ; 

 diameter of corolla tube opening 3 ; length of filaments 



2 = 3; width of seeds 2 ; length of upper epidermal cells 



2 and width of upper epidermal cells 3 of the cotyledons ; 

 size of glands 2 , and size of stomata 2 of the upper epi- 

 dermis of the cotyledons ; length of lower epidermal cells 



2 , width of lower epidermal cells 2 = 3, size of lower 

 epidermal glands 2 , and size of lower epidermal stomata 



2 of the cotyledons ; length of cork cells 2 ; width of 

 cork cells 2 = 3; length of cork cambial cells 3 ; width 

 of cork cambial cells 3 ; length of cortex cells 3 ; width 

 of cortex cells 2 on the transverse section of the root; 

 width of epidermal cells 2 ; number of cork layers 



2 = 3; length of cork cambial cells 2 ; width of cork 



cambial cells 2 = 3 ; length of endodormal cells 2 ; 

 width of endodermal cells 2 ; number of chambered crys- 

 tal cells 2 , greater development of wood 2 , diameter of 

 largest vessels 2 in the transverse section of the stem; 

 diameter of glands 9 , length of hairs 3 , and length of 

 cells 2 of the- upper epidermis of the leaf at the base; 

 width of cells 2 = 3 ; diameter of glands 2, length of 

 hairs 3 , length of papillae along veins 2 = 3 of the upper 

 epidermis of the leaf at the apex; diameter of glands 2 

 and length of cells 2 of the lower epidermis of the leaf 

 at the base; the length of cells 2 , the width of cells 2 , 

 of the lower epidermis of the leaf at the apex; the diame- 

 ter of the cortex cells 3 , and the diameter of the largest 

 vessels 2 on the transverse section of the petiole; the 

 width of the cells 3 , the number of glands 2 = 3, the 

 diameter of glands 2 = 3 , and the length of the multi- 

 cellular protuberances 2 of the epidermis at the base of 

 the petiole ; the length of the upper epidermal cells 2 , 

 and the width of the upper epidermal cells 2 = 3, and the 

 size of the lower epidermal cells of the corolla limb ; the 

 length of the outer cells 2 , and the width of the outer 

 cells 2 = 3 of the corolla tube. 



(6) Lower than in either parent: Number of seeds in 

 a capsule 3 ; proportion of seeds that germinate 2 = 3; 

 number of stomata on the upper epidermis of the coty- 

 ledons 2 ; number of stomata on the lower epidermis of 

 the cotyledons 3 ; number of protoxylem patches 2 in 

 the transverse section of the stem ; number of stomata 2 

 on the lower epidermis of the leaf at the base; number of 

 stomata 2 , and number of glands 2 , on the lower epi- 

 dermis of the leaf at the apex. 



Table J 10. — Summary of characters of hybrid-stock as regards 

 sameness, intcrmediatencss, excess, and deficit of development 



in relation to parent-stocks. 



2. Macroscopic and Microscopic Characters of 



Lelia puepubata, Cattleya mossi^e, and 



L-elio-cattleya canhamiana. 



(Plate 30, figs. 178 to 183. Tables J, 11 to 20; and I, 2 and 



tSummaries. Chart F 2.) 



General Descriptions. 



Data for these descriptions were obtained from Veitch 

 (Manual of Orchidaceous Plants, i, 22, 180). Engler 

 and Prantl (Die Natiirluhen Pflanzen-familien, n. Th. 

 6, 146, 147), Lindley (Botanical Magazine, T. 3669), and 

 Sander (Orchid Guide, 98, 24, 100). 



Lcelia purpurata Lindl. and Paxt. (Seed Parent). — 

 Stems oval, compressed, smooth. Pseudobulbs inclosed 

 by a scaley sheath and ridged when old. Leaves long, 

 leathery, dark green above, paler beneath, persistent. 

 Peduncles arise from green, leathery, flattened sheaths 

 about 6 and a half inches long and are 3 to 7 flowered. 

 Flowers large ; sepals oblong-lanceolate, acute, white or 

 white tinted and veined with very pale amethyst-purple ; 



