A Grammatical Dictionary of Botanical Latin

Lamella,-ae (s.f.I), abl.sg. lamella, nom.pl. lamellae, acc. pl. lamellas, dat. & abl.pl. lamellis: thin plate of tissue, 'blade', gill, q.v., a thin layer; “a plate or thin part such as is found at the end of many styles” (Lindley); thin green ridges or platelike [longitudinal] projections on the costa or lamina of some moss leaves, such as Aloina, Crossidium, Pterygynandrum, genera in the Polytrichaceae; the trabeculae or projections on the back of peristome teeth; (of fungi) a gill; [> L., dim. of lamina,-ae (s.f.I) a thin plate]; see gill, trabecula,-ae (s.f.I); see gill;

NOTE: in some thalloid liverworts, such as Geothallus or Petalophyllum, outgrowths on the thallus surface have been erroneously called ‘leaves’ (folia), but which are ‘leaf-like’ lamellae or lobes, or even wings (ala,-ae (s.f.I);

- cortice in lamellas exfolianti, with the bark exfoliating into plates.

- discus magnus, irregularis, completus, dorso in lamellas 2 linguaeformes exteriore longiore productus (B&H), the disc large, irregular, perfect, on the back prolonged into two tongue-shaped lamellae, the outer prolonged longer.

- (moss; Polytrichum) nervo lato, dorso laevi, intus in lamellas 4 vel rarius 5, longitudinales, undulatas producto (Hooker), with a broad nerve [i.e. costa], smooth on the back, inside extended into 4 or more rarely 5, longitudinal undulate plates.

- semen, magnum, lamellis 4, carnosis, germnans (Swartz), the seed large, germinating, with four fleshy lamellae.

- stamina filamenta breviter unguiculata, hinc in ligulam dilatata, extus saepius lamella erecta appendiculata (DeCandolle), stamens bearing shortly unguiculate filaments, from here dilated into a ligule, externally more often with an erect, appendaged lamella.

- [Asclepiadeae] Coronae squamae 5, tubo stamineo basi adnatae, subplanae, apice intus saepius lamella v. carina instructae (B&H), scales of the corona 5, adnate to the stamineal tube at the base, nearly flat, at the apex, inside, more often with a lamella or keel provided.

Lamella media (adj.A); lamella mediana (adj.A): the middle lamella, “the membrane or primary septum between any two cells” (Jackson).

Dorsal plates: (in bryophytes) the outer surface of an arthrodontous peristome tooth, each plate representing the inner periclinal wall of one cell: lamella,-ae (s.f.I) dorsalis, abl. sg. lamella dorsali.

Plica,-ae (s.f.I), abl.sg. plica: fold, crease; “the lamella in Fungi” (Jackson).

NOTE: the lamellae of mushrooms are the gills. The flesh of the gill is the trama,-ae (s.f.I), q.v.

NOTE: the sulci are “the lamellae of certain Fungals” (Lindley); see sulcus,-i (s.m.II).

NOTE: “lamellae, laminae, lamellulae: “the gills of Fungals; vertical, membranous, radiating, or branching plates belonging to a pileus” (Lindley).

Lamella mediana (adj.A): middle lamella, “the membrane or primary septum between any two cells” (Jackson).