Wight & Arnott

Nova Acta Phys.-Med. Acad. Caes. Leop.-Carol. Nat. Cur. 18: 355. 1836

Common names: Mud mat
Etymology: Greek glossa, tongue, and stigma, spot, alluding to ligulate stigma
Treatment appears in FNA Volume 17. Treatment on page 369. Mentioned on page 365, 366, 370.
Herbs, annual or perennial, aquatic, mat-forming; stolons horizontal. Stems functionally stolons. Leaves on stolons, opposite; petiole absent [present]; blade fleshy, margins entire, obscurely uninerved (midvein). Inflorescences axillary, flowers solitary; bracts absent. Pedicels absent or present, longer or shorter than calyces; bracteoles absent. Flowers [monomorphic] dimorphic (perianth), erect or sessile; sepals 3[4], calyx radially or bilaterally symmetric, campanulate or urceolate, lobes oblong, adaxial lobe longer; petals 0 or [3–]5, corolla fugacious, white [suffused with blue, pink, or purple], bilaterally symmetric, weakly bilabiate, short-funnelform, abaxial lobes 3, adaxial 2, smaller; stamens 2[4], equal [didynamous], filaments glabrous; staminode 0; ovary 2-locular, placentation axile; stigma broad, flaplike, or relatively small. Fruits capsules, dehiscence loculicidal. Seeds 12–73[100], brown, flattened, wings absent. x = 5.


Asia, Africa, Pacific Islands (New Zealand), Australia.


Species 7 or 8 (1 in the flora).

Chromosome counts from New Zealand (E. J. Beuzenberg and J. B. Hair 1983; P. J. de Lange et al. 2004) indicate a base number of x = 5 for Glossostigma. An anomalous count (2n = 32) has been reported for G. diandrum (Linnaeus) Kuntze from Bangladesh (see M. O. Rahman 2006).

Facts about "Glossostigma"
AuthorDonald H. Les + and Robert S. Capers +
AuthorityWight & Arnott +
Common nameMud mat +
DistributionAsia +, Africa +, Pacific Islands (New Zealand) + and Australia. +
EtymologyGreek glossa, tongue, and stigma, spot, alluding to ligulate stigma +
Illustration copyrightFlora of North America Association +
IllustratorYevonn Wilson-Ramsey +
Introducedtrue +
Publication titleNova Acta Phys.-Med. Acad. Caes. Leop.-Carol. Nat. Cur. +
Publication year1836 +
Referenceles2006a +
Source xml grained fna xml/V17/V17 1267.xml +
Special statusIntroduced +
Taxon familyPhrymaceae +
Taxon nameGlossostigma +
Taxon parentPhrymaceae +
Taxon rankgenus +
VolumeVolume 17 +