ENGLISH 15 
331 disciform — flat and circular, orbicular [f300, g876, 350]. 
332 discoid — flattened and disclike or platelike [f300, g876, s353]. 
333 discoid gemma (pl. gemmae) — a multicellular, disc-shaped brood body [f794, g219, 
$1168]. 
334 dispositio — arrangement of parts; i.e., phyllotaxy [f307, g69, s355]. 
335 disseminule — agent of dispersal (see diaspore) [f302, g205, 1055, s354]. 
336 distal — away from the base or point of attachment; towards the apex of a leaf or stem; 
the outer, convex face of a spore; (opposed to proximal) [f303, g220, s356]. 
337 distant — well spaced; e.g., leaves positioned with a space between adjacent leaves [f304, 
338 distichous — leaves alternating in two opposite rows; e.g., Fissidens, Distichium [f305, 
g1144, s358]. 
339 divaricate — separating, divergent [f306, g394, s359]. 
340 divergent — turned in opposite directions [f308, g9, s360]. 
341 divisural line — see median line [f583, 676, s717]. 
342 dolabriform (dolabrate) —- axe-shaped (see cuneate) [f309, g123, 144, s361]. 
343 domatium (pl. domatia) — modified sheltering projections; e.g., the Nostoc auricles of 
Blasia [f310, g222, s362]. 
dorsal — (of leaves) - the abaxial, back, or lower surface; (of peristome teeth) - the outer 
face; (of stems or thalli) - the upper surface, away from the substrate; (note: the apparent 
discrepancy of meaning between leaves and stem can cause confusion; opposed to 
ventral) [f311, g229, 861, s363]. | 
345 dorsal lamina (pl. laminae) — part of the leaf blade opposite the sheathing base, at the | 
back of the costa and below the apical lamina; e.g., Fissidens and Sorapilla [f566, g230, 
s694] 
346 dorsal plates — the outer surface of an arthrodontous peristome tooth, each plate 
representing the inner periclinal wall of one cell; also called lamallae [f754, g231, s879]. 
347 dorsal scale — surface outgrowth in certain thalloid liverworts such as the unistratose 
scales protecting the antheridia; e.g., Pallavicinia [f316, g232, s422]. 
348 dorsiventral — flattened, with distinct upper and lower surfaces [£312, g233, s364]. 
349 double peristome — having both an endostome and an exostome (cf. diplolepidous) [f730, 
g225, s866]. 
350 doubly serrate — serrate with teeth in pairs [f1071, g226, s109]. 
351 down — often loosely used for facing proximally, irrespective of gravity [f98, g-apx, si]. 
352 duplicate lamina — see vaginant lamina [f568, g223, s695]. 
353 dwarf male — tiny male gametophyte usually borne on the female plant [f602, 1145, s774]. 
E 
354 echinate — roughened by blunt spiny projections [f321, £512, s412]. 
355 ecostate — without a costa [f339, g852, s366]. 
356 edentate — without teeth; i.e., entire leaf margins [f322, g1038, s367]. 
357 egg — see ovum [f670, g265, s638]. 
