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 9 , length of petiole 9 , and the angle 

 between the lobes of the cotyledons; the distance from 

 the ground before the stem branches $ ; shape of the 

 lamina of the mature leaf; length of the lamina 9 ; 

 length of the petiole $ ; 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 $ ; 

 relationship of peduncle to pedicel; waviness of upper 

 epidermal cell walls of cotyledons ; number of glands on 

 upper epidermis $ ; waviness of lower epidermal cell 

 walls ; number of glands on lower epidermis 9 ; 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 9 ; the number of crystal cells in 

 intraxylary phloem in the transverse section of the 

 stem ; the number of stomata 9 , the number of glands 9 , 

 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 papillae along the veins 9 ; the 

 length of papillse along the margin 9 , 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 9 ; the outline and 

 the number of cortex layers in the transverse section of 

 the petiole ; the length of the epidermal cells 9 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 9 ; extensiveness of root system 9 ; diameter of 

 stem 9 ; growth of stem 9 ; length of branches 9 ; num- 

 ber of leaves $ ; width of lamina 9 ; firmness of texture 

 of lamina 9 = 3; duration of green leaves 9 = $ ', re- 

 sistance to insects 9 = 3; length of flower-stalk 9 ; 

 length of corolla tube $ ; diameter of corolla limb 9 = 3; 

 diameter of corolla tube opening 3 ; length of filaments 

 9 = 3; width of seeds 9 ; length of upper epidermal cells 

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



size of glands 9 , and size of stomata 9 of the upper epi- 

 dermis of the cotyledons ; length of lower epidermal cells 



9 , width of lower epidermal cells 9 = 3, size of lower 

 epidermal glands 9 , and size of lower epidermal stomata 



9 of the cotyledons; length of cork cells 9 ; width of 

 cork cells 9 = 3; length of cork cambial cells 3 ; width 

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

 of cortex cells 9 on the transverse section of the root; 

 width of epidermal cells 9 ; number of cork layers 



9 = 3; length of cork cambial cells 9 ; width of cork 



cambial cells 9 = 3; length of endodermal cells 9 ; 

 width of endodermal cells 9 ; number of chambered crys- 

 tal cells 9 , greater development of wood 9 , diameter of 

 largest vessels 9 in the transverse section of the stem ; 

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

 cells 9 of the upper epidermis of the leaf at the base ; 

 width of cells 9 = 3; diameter of glands 9 , length of 

 hairs 3 , length of papilla? along veins 9 = 3 of the upper 

 epidermis of the leaf at the apex ; diameter of glands 9 

 and length of cells 9 of the lower epidermis of the leaf 

 at the base ; the length of cells 9 , the width of cells 9 , 

 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 9 on the transverse section of the petiole; the 

 width of the cells 3 , the number of glands 9 = 3, the 

 diameter of glands 9 = 3, and the length of the multi- 

 cellular protuberances 9 of the epidermis at the base of 

 the petiole ; the length of the upper epidermal cells 9 , 

 and the width of the upper epidermal cells 9 = 3, and the 

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

 length of the outer cells 9 , and the width of the outer 

 cells 9 = 3 of the corolla tube. 



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

 a capsule 3 ; proportion of seeds that germinate 9 = 3; 

 number of stomata on the upper epi'dermis of the coty- 

 ledons 9 ; number of stomata on the lower epidermis of 

 the cotyledons 3 ; number of protoxylem patches 9 in 

 the transverse section of the stem ; number of stomata 9 

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

 stomata 9 , and number of glands 9 , on the lower epi- 

 dermis of the leaf at the apex. 



TABLE J 10. Summary of characters of hybrid-stock as regards 

 sameness, intermedia! eness, excess, and deficit of development 

 in relation to parent-stocks. 



2. MACROSCOPIC AND MICROSCOPIC CHARACTERS OF 



LJELIA PURPTJRATA, CATTLEYA MOSSI^E, AND 



LJELIO-CATTI/EYA CANHAMIANA. 



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

 Summaries. Chart F 2.) 



GENEBAL DESCRIPTIONS. 



Data for these descriptions were obtained from Veitch 

 (Manual of Orchidaceous Plants, I, 22, 180), Engler 

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

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

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



Lcclia purpurata Lincll. and Past. (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 ; 



