ENGLISH 25 
571 inrolled — rolled upwards (adaxially) and tightly inwards; applied to leaf margins (syn. 
involute; cf. incurved and inflexed) [f343, g254, s104, 396] 
572 insertion -— the place or line of attachment of a structure; applied to leaves and branch on 
stem, peristome, etc [f541, g63, s668]. 
573 intercalary — inserted between; e.g., meristems with growth that is not apical or basal, but 
occurs some distance between [f542, g522, s669]. 
574 intercalary branch -- any branch positioned between two leaves, the associated leaves not 
modified by branch formation; loosely used for various branching modes with delayed 
branch formation (opposed to terminal branch) [f829, g523, s969]. 
575 interlobule -- see stylus [(545, g510, 524, 989, s672]. 
576 intermediate thickening —- prominent cell wall thickenings positioned between trigones 
[f351, g525, s392]. 
577 internal cylinder — central axis of Sphagnum stem, inside hyalodermis (cf. central strand) 
[f263, g518 
578 interstereid cells — see guide cells [f170, g201, s671]. 
579 intine — the innermost wall layer of a spore [f547, g526, $673]. 
580 prs vitia the ell lumen; luminal [f548, g527, s674]. 
581i I; structures close to or associated with the margin but not 
strictly on n the margin (see teniole) [f549, g818, s675]. 
582 intricate — interwoven, entangled [f550, g1068, s676]. 
583 involucellum (pl. involucella) — an extensive sheath-like haustorial collar; e.g. Jackiella 
[f551, g479, 529, s678] 
584 involucral bracts — a sheath of foliar origin, derived by a fusion of the bracts surrounding 
a perianth (cf. involucral scales) [f120, g478, s142]. 
585 involucral flap — a flap of thallus tissue covering the gynoecium; e.g., Pellia epiphylla 
f346, g481, s892]. 
586 involucral scales — scales of thalloid origin, surrounding a gynoecium; eg., Pallavicinia 
[f317, g482, s423 
587 involucre — a jiotidius sheath of tissue of thalline origin surrounding a single 
sbaitm (e & s , Some daeighn uE gu Meoptent or sporophyte (e.g., 
; jdpiem used loosely as a general 
term for any sheath Mich srt or gametangia; archaic term 
for perigonial and perichaetial eds (cf. pseudoperianth) [f552, g480, 528, s679]. 
388 involute — rolled upward (adaxially) and tightly inward, applied to leaf margins (syn. 
inrolled; cf. incurved; opposed to revolute) [f553, g254, s680]. 
589 irregular -- asymmetric; not fitting any detectable pattern [f554, g1040, s681]. 
590 isodiametric — about as broad as long; applied to cells about the same diameter in all 
directions; including square, rounded, or hexagonal [f555, g530, s682]. 
3591 isophyllous — having stem and branch leaves similar; (opposed to anisophyllous) [f556, 
8531, s683] 
592 isosporous — having spores with a unimodal distribution of size [f557, g532, s684]. 
