88 MISSOURI BOTANICAL GARDEN. 
EXPLANATION ON PLATES ILLUSTRATING LEITNERIA 
FLORIDANA. 
The habit illustrations were drawn by Miss Grace E. 
Johnson, from living plants or herbarium material. The 
details are reproduced directly or redrawn from photo- 
micrographs or drawings by the author. 
Plate 30,— 1, Leafing twig, in spring; 2, autumnal leaf; 3, staminate 
catkin; 4, opening pistillate catkin; 5, branch with partly grown fruit. 
All natural size. 
Plate 31. —1, Pistillate, and 2, staminate shoots, in winter, natural 
size; 3, bud and leaf scar details, 3; 4, stem hair, X150; 5, excep- 
tional, substellate arrangement of hairs, 200; 6, base of hair, 250; 
7, glandular hair, 180; 8, nature print of young leaf, natural size; 9, 
lower surface of old leaf, x2. 
Plate 32. — 1, Staminate flower, with portion of base of bract, and 2, 
dehiscent stamen, <4; 3, ventral, dorsal, and lateral view of indehis- 
cent stamen, <9; 4, enlarged longitudinal section of a portion of a 
staminate catkin, showing fissuring of bracts; 5, part of a similar sec- 
tion, showing extrorse stamens and fissures of bracts and axis of in- 
florescence, 18; 6, pollen grain from one end, and in optical section, 
400; 7, cross section of pistillate catkin, 18, showing fissured axis 
ata, adnate base of bract with fissure at b, receptacle or disk with 
perianth, glands, and subtending bract atc, ovary with ovule and sub- 
tending bract at d, lower part of stigma with bract at e, and upper 
part of stigma with bract at f, — the sections belonging to successively 
lower flowers, in the order of lettering, — from one of a series of cel- 
loidin sections, retaining the several flowers and their parts in their 
natural position. 
Plate 33. — Details of pistillate flower and fruit: 1, fully expanded 
pistillate catkin, natural size; 2, young flower with bract and scales from 
the inner side, 5; 8, longitudinal section of young flower, showing 
disk and scales, 18; 4, scales or segments of perianth, 18; 5, longi- 
tudinal section of portion of catkin, 18, showing lacunose axis and 
bracts, and pistil at point of separation from disk; 6-7, ovule entire and 
in section, 18, — the bract at the left asin fig. 5; 8, fertilized ovary 
after fall of style, <5; 9-10, partly grown fruits, with longitudinal and 
cross sections, <2; 11, dried mature fruit, <2. 
Plate 34. — Cross sections of wood of stem, showing duct patterns, 
<60. 
Plate 35. — Similar sections, for the annual rings, the upper 60, the 
lower 125. 
Plate 36. — Tangential sections of stem wood, the upper >60, the 
lower, showing septate libriform, 125. 
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