Skip to main content

Service Notice

The Western Australian Herbarium’s collections management system and census were set to read-only mode on 1 October 2025. Taxonomic updates published since this time are not being reflected in Florabase, herbarium collections, or Western Australia’s taxonomic names census (Nomos). Conservation listings displayed on Florabase may also be out of date. Please refer to DBCA’s Threatened species and communities webpage for the most recent Threatened and Priority Flora List, noting that recent taxonomic updates are similarly not included. Our database migration is moving to a staging phase. We thank you for your patience as we ensure the integrity of our biodiversity data, develop new workflows, and train staff to use the new systems. Please reach out to us if you have any questions or concerns.

The notice period started at 12:00 pm on Wednesday, 1 October 2025 +08:00 and will end at 12:00 pm on Friday, 1 January 2027 +08:00.

Advanced Search

Macgregoria F.Muell.

Reference
Fragm. (Mueller) 8:160 (1874)
Name Status
Current

Scientific Description

Family Stackhousiaceae.

Habit and leaf form. Herbs. Plants succulent to non-succulent. Annual. Young stems ribbed. Stem internodes solid. Rhizomatous. Mesophytic, or xerophytic. Leaves alternate; spiral; somewhat fleshy, or leathery; petiolate, or subsessile, or sessile; non-sheathing; simple; epulvinate. Leaf blades entire; linear, or lanceolate, or oblanceolate; narrowly linear; one-veined, or pinnately veined. Leaves inconspicuously with stipules. Stipules interpetiolar; scaly; caducous (sometimes), or persistent. Leaf blade margins entire. Leaf anatomy. Hairs absent. Extra-floral nectaries absent.

Reproductive type, pollination. Fertile flowers hermaphrodite. Unisexual flowers absent. Plants hermaphrodite.

Inflorescence and flower features. Flowers aggregated in ‘inflorescences’; in racemes. The terminal inflorescence unit cymose, or racemose. Inflorescences terminal. Flowers pedicellate (slender); bracteate (1 at base of pedicel subtends each flower); bracteolate (2 subtend each flower); regular; 5 merous; cyclic; tetracyclic. Free hypanthium present; shallow. Hypogynous disk present (lining the calyx tube). Perianth with distinct calyx and corolla; 10; 2 -whorled; isomerous. Calyx present; 5; 1 -whorled; gamosepalous (connate towards the base); deeply blunt-lobed; imbricate; regular, or unequal but not bilabiate; green (A), or cream (KP). Calyx lobes narrowly triangular. Corolla present; 5; 1 -whorled; polypetalous; imbricate; unequal but not bilabiate, or regular; white and pink (with a pink throat). Petals narrowly obovate; clawed. Androecial members definite in number. Androecium 5. Androecial members free of the perianth; all equal; free of one another; 1 -whorled. Androecium exclusively of fertile stamens. Stamens 5; all more or less similar in shape; isomerous with the perianth; oppositisepalous (on the margin of the disc). Anthers dehiscing via longitudinal slits; tetrasporangiate; appendaged. The anther appendages apical. Gynoecium 5 carpelled. The pistil 5 celled. Carpels isomerous with the perianth. Gynoecium syncarpous; synstylovarious, or eu-syncarpous; superior. Ovary plurilocular; 5 locular. Gynoecium stylate. Styles 1; attenuate from the ovary, or from a depression at the top of the ovary; apical. Stigmas 1, or 5; 5 - lobed (A). Placentation axile to basal. Ovules 1 per locule; ascending; apotropous; with ventral raphe; anatropous.

Fruit and seed features. Fruit non-fleshy; a schizocarp. Mericarps comprising nutlets (cocci). Fruit 5 celled; about 4 seeded, or 5 seeded. Seeds endospermic. Endosperm oily. Cotyledons 2. Embryo straight.

Etymology. After John Macgregor (1828–84), solicitor, MLA of Victoria.