Citation: F. Muell., Trans. Vict. lnst. 1:125 (1855).

Synonymy: H. serra ( gracilis Sonder, Linnaea 28:230 (1856).

Common name: Smooth raspwort.

Description:
Perennial herb or subshrub 20-45 cm tall, rootstock a tap root, stems erect or ascending, 4-ribbed, glabrous or scabrous with curved 1- or 2-celled hairs 0.1-0.3 mm long; leaves alternate, sessile, linear to linear-lanceolate 10-30 (rarely 50)mm long, 2-4 (rarely 8)mm wide, entire or coarsely toothed in the distal part, subfleshy, glabrous or scabrous.

Inflorescence composed of 1-7-flowered dichasia; lateral inflorescences in axils of upper leaves; bracts green, lanceolate, 5-8 (rarely 15)mm long, entire; bracteoles yellow-brown, lanceolate, 2-3 mm long, entire; flowers 4-merous, shortly pedicellate; sepals deltoid, 0.8-1 mm long, smooth; petals green to red, 2.4~3 mm long; stamens 8, anthers oblong, 1.6-2.3 mm long; styles 4, yellow-green to pink or red, c. 0.6 mm long; ovary turbinate, 0.6-1 mm long, weakly 4-ribbed.

Fruit 4-ribbed or -winged, variously ornamented; 4-locular.

Distribution:  Found mainly in sandy soils in coastal or subcoastal situations.   W.Aust. Conservation status: native Flowering time: Nov. — Feb.

SA Distribution Map based on current data relating to specimens held in the State Herbarium of South Australia

Biology: No text

Taxonomic notes: Populations are often polymorphic in their fruit shape, and the following forms can be recognised.

Key to Infraspecific taxa:

1. Fruit with well-defined longitudinal wings 1.5-2.5 mm wide opposite the petals
2. Tubercle present between the wings
3. Wings oblong, extending the full length of the fruit	forma subacutangula 1i.
3. Wings approximately deltoid, in the upper part of the fruit only	forma semiangulata 1g.
2. Fruit smooth between the wings
4. Wings oblong, extending the full length of the fruit	forma tetraptera 1k.
4. Wings deltoid
5. Wing in the centre of the fruit
6. Wing occupying most of the length of the fruit; fruit broader than long.	forma stellata 1b.
6. Wing not extending to the top and the bottom of the fruit; fruit longer than broad or isodiametric	forma dentara 1c.
5. Wing terminal or basal
7. Wing in the upper part of the fruit only	forma turbinata 1l.
7. Wing at the base only	forma pyramidata 1f.
1. Fruit lacking wings opposite the petals, or wings reduced to ribs
8. Exocarp inflated, fruit globose, smooth or weakly 4-ribbed	forma inflata 1d.
8. Exocarp not inflated
9. Tubercle present on the fruit below the sepals
10. Ribs lacking a tubercle	forma tetraglebosa 1j.
10. Ribs also with a basal or median tubercle; fruits fusiform or obturbinate
11. Ribs with a median tubercle, fruit fusiform	forma annulata 1b.
11. Ribs with a basal tubercle, fruit obturbinate., forma obturbinata 1e
9. No tubercle on the fruit below the sepals
12. Ribs also lacking a tubercle	forma acutangula 1a.
12. Ribs with a median tubercle	forma dentata 1c.

Author: Not yet available