38 ENGLISH 
subsequent differentiation of diploid elaterocytes; protoplasmic at maturity (cf. elaters) 
Pate xi via (pl j hyllia) — small, unistratose, filiform or foliose : 
structure resembling paraphylium, but restricted to the areas of the stem around branch 1 2 
primordia; oft [f811, g805, s943]. ; 
859 pseudoperianth — tissue of thalline origin surrounding the archegonial cluster, calyptra 
and subsequent sporophyte; e.g., Pallavicinia, Marchantia [f812, g806, s944]. 
860 pseudopodium (pl. pseudopodia) — an elongation of the gametophyte axis below the 
sporophyte in Sphagnum and Andreaea, serving the function of a seta; also appliedtoa — 
similar extension of a stem tip bearing clusters of gemmae (see proboscis) [(813, 807, 
861 pseudopores — pore-like structures with a thin b that may be revealed by 
staining; e.g. found in hyalocysts of Calymperaceae; in Sphagnum leaves, consisting of 
fibril oed without an Vae mien [f814, g808, s946]. 
862 p (pl. r t ) — in Sphagnum capsules, vestigial stomata, coi of. 
d cells but [f815 , g809, s942]. 
863 pseudothallose - - pertaining to a false thallus; a leafy liverwort gametophyte that 
a th form; e.g., Metzgeriopsis [f816, g1010, s947]. n 
864 pterygodont — a type of nematodontous peristome found in the Polytrichales that hasa — 
longitudinal wing-like crest or flange on the inner surface [f817, g810, s949]. ir 
865 pugioniform — dagger-shaped [f818, g-, s950]. 
866 pulvinate — cushion-shaped [f819, g566, s951]. 
867 punctate —- dotted, usually referring to spore M [f773, g811, s953]. 
868 punctulate — minutely dotted [f774, g325, s9. 
869 pungent — ending in a rigid and sharp point ici g970, s956]. 
870 pustulose — iuamisie pimply mm g812, s957]. 
pyrenoid cture, involved in starch synthesis, found in the 
chloroplast of hornworts and numerous algae [f821, g813, s877]. 
form — pear-shaped; e.g., capsules of Bryum [f748, g151, s878]. 
Q 
874 quadrate — square or nearly so [f147, g814, s298]. 
875 e. - divided into four basically equal lobes or segments (cf. bisbifid) [(822, gu. 
a7, quinquefarious — having five ranks of leaves [f823, Lati s960]. 
punctate pore of a hyalocyst; consisting of a central - 
wctms with four smaller pores at the corners; e.g., Calymperes erosum [1824, g-ap*; 
