Common name: Hyssopleaf Sandmat, Hyssop Leaf Sandmat
Euphorbia hyssopifolia L. APNI*
Synonyms: Chamaesyce hyssopifolia (L.) Small APNI*
Description: Annual herb to c. 60 cm high, stems decumbent to ascending, often with 1 or 2 bands of short curled hairs.
Leaves elliptic-oblong, 6–30 mm long, 3–10 mm wide, margins toothed, base asymmetric, both surfaces with scattered long hairs but becoming ± glabrous; petiole 1–2 mm long; stipules 0.5 mm long, triangular.
Cyathia in axillary or terminal cymes, occasionally solitary; involucre 1–1.5 mm long; glands transversely ovate, yellow; appendages c. 0.5 mm wide, white to pink.
Capsule 2–2.5 mm long, smooth, glabrous; seeds ovoid to quadrangular, transversely wrinkled, blackish.
Flowering: mainly summer.
Distribution and occurrence: Native of Amer.
NSW subdivisions: *NC, *CC, *NT, *CT, *NWS, *LHI
Other Australian states: *W.A. *N.T. *Qld
Chamaesyce nutans and Chamaesyce preslii are names that have been misapplied to Chamaesyce hyssopifolia (= Euphorbia hyssopifolia) in Australia.
Text by T.A. James & G.J. Harden, as Chamaesyce nutans in Flora of NSW 1 (1990)
Taxon concept: Halford, D.A. & Harris, W.K. (2012), A taxonomic revision of Euphorbia section Anisophyllum Roeper (Euphorbiaceae) in Australia. Austrobaileya 8(4): 500-501; accepted by APC (accessed January 2017)
APNI* Provides a link to the Australian Plant Name Index (hosted by the Australian National Botanic Gardens) for comprehensive bibliographic data
***The AVH map option provides a detailed interactive Australia wide distribution map drawn from collections held by all major Australian herbaria participating in the Australian Virtual Herbarium project.