A Grammatical Dictionary of Botanical Latin

Haustorium: haustorium,-ii (s.n.II), abl. sg. haustorio, nom. & acc. pl. haustoria, dat. & abl.pl. haustoriis; “a small root which attaches itself to the surface of some other plant, and lives by sucking it. A sucker, as in Dodder, Ivy, &c.” (Lindley); “1. a sucker of parasitic plants; 2. used by Komarow for an appendage of perithecia; 3. a structure arising from the secondary nucleus of Lathraea, the embryo sac containing two haustoria, one equatorial, the other micropylar (Chodat)” (Jackson); “root-like suckers of parasitic plants like Cuscuta” (Fernald 1950); (in fungi) “a special hyphal branch, esp. one within a living cell of the host, for absorption of food; used in addition, by deBary, for organs of attachment (appressoria)” (Ainsworth & Bisby); (in mosses) an elongate cell(s) at the base of the foot, most prominent in the embryonic sporophyte; thought to function in absorption during early stages of sporophyte growth” (Magill 1990) [> L. haustor,-oris (s.m.III), a drawer, as a water-drawer; haustrum,-i (s.n.II), a machine for drawing water (Lewis & Short); see holdfast; see appressorium,-ii (s.n.II); ); see rhizoid; see sucker;

- fruticulus parasiticus caulibus volubilibus haustoriis affixis, shrublet parasitic with stems twining by haustoria attached (Stearn).

NOTE: same as radix hauriens, a haustorium (Lindley); radix,-icis (s.f.III) hauriens (part.B), abl. sg. radice hauriente, a “drinking in” root, a haustorium, the root of parasitic organisms.

Haustorium appendiculatum (adj.A), abl. sg. haustorio appendiculato: when the haustoria arise from a protrusion of the hyphae, appressors (Jackson).

Haustorium exappendiculatum (adj.A), abl. sg. haustorio exappendiculato: when the haustoria arise directly from the hyphae without much contortion at the point of origin (Jackson).

Haustorium lobulatum, abl. sg. haustorio lobulato: lobed appressors.