Helicia

Helicia glabrifolia, copyright J. Wrigley.

Belongs within: Proteaceae.

Helicia is a genus of about 90 species of trees and shrubs found from southern and south-east Asia to eastern Australia. The genus is most diverse in New Guinea where about fifty species can be found.

Characters (from Foreman 1995): Leaves mostly spirally arranged, rarely subopposite or 3- or 4-verticillate, sessile or petiolate, simple, entire or more or less serrate. Inflorescences not branched, axillary or ramiflorous, occasionally subterminal or terminal. Peduncles present. Flowers bisexual, pedicellate, in pairs, subtended by small caducous or subpersistent bract; floral bracts present, very small, caducous or subpersistent. Perianth straight, slender; limb straight, more or less subglobose or clavate; perianth segments becoming free and revolute at anthesis. Anthers all perfect, oblong, sessile in concave limb segments; connective apiculate. Disc free or more or less connate into cup. Ovary sessile, glabrous or more or less tomentose, 1-locular; ovules 2, anatropous, attached at base of ovary or ventrally; style slender; pollen presenter straight, more or less clavate; stigma terminal, very small, more or less circular. Fruit indehiscent or tardily dehiscent; pericarp coriaceous, sometimes with distinct zone of fibres or fibre-sclereids. Seeds usually one, rarely two, usually subglobose; cotyledons fleshy.

<==Helicia
    |--H. acutifolia Sleum. 1939 F95
    |--H. affinis Sleum. 1939 [incl. H. moluccana Laut. 1913 non (Brown) Bl. 1834] F95
    |--H. albiflora Sleum. 1939 F95
    |--H. amplifolia Sleum. 1939 F95
    |--H. archboldiana Sleum. 1955 F95
    |--H. australasica Muell. 1857 [incl. H. dentellata Sleum. 1939, H. glabrescens White 1944] F95
    |--H. bullata Sleum. 1955 F95
    |--H. calocoma Foreman 1985 F95
    |--H. cameronii Muell. 1889 F95
    |--H. carrii Sleum. 1939 [incl. H. brassii Sleum. 1939, H. divaricata Sleum. 1939] F95
    |--H. coeruleopurpurea Royen 1983 F95
    |--H. commutata Sleum. 1939 F95
    |--H. finisterrae Laut. 1913 F95
    |--H. forbesiana Muell. 1886 F95
    |--H. glabrifolia MM09
    |--H. hypoglauca Diels 1916 F95
    |--H. insculpta Sleum. 1939 [incl. H. biformis Sleum. 1939] F95
    |--H. insularis Foreman 1985 F95
    |--H. laiagamensis Foreman 1985 F95
    |--H. latifolia White 1922 F95
    |--H. lauterbachiana Sleum. 1939 [incl. H. grandifolia Laut. 1910 non Lecomte 1910] F95
    |--H. ledermannii Diels 1916 F95
    |--H. longespicata Sleum. 1939 F95
    |--H. macrostachya Laut. 1913 F95
    |--H. microneura White 1939 [incl. H. arguta Sleum. 1939] F95
    |--H. microphylla Diels 1916 [incl. H. microcarpa Sleum. 1955] F95
    |--H. neglecta Diels ex Sleum. 1939 F95
    |--H. obtusata Sleum. 1939 [incl. H. clemensiae Sleum. 1939] F95
    |--H. odorata Diels 1916 F95
    |--H. olivacea Sleum. 1939 F95
    |--H. oreadum Diels 1916 (see below for synonymy) F95
    |--H. pallescens Diels 1916 F95
    |--H. peekelii Laut. 1911 F95
    |--H. peltata White 1929 F95
    |--H. platyphylla Sleum. 1939 F95
    |--H. polyosmoides Foreman 1985 F95
    |--H. retevenia Sleum. 1939 F95
    |--H. retusa Foreman 1985 F95
    |--H. rostrata Foreman 1985 F95
    |--H. saruwagedica Sleum. 1939 F95
    |--H. saurauioides Sleum. 1955 F95
    |--H. schlechteri Laut. in Sch. & Laut. 1905 F95
    |--H. sellae-montis Sleum. 1939 F95
    |--H. stelechantha Diels 1916 F95
    |--H. subcordata Foreman 1985 F95
    |--H. torricellensis Laut. in Sch. & Laut. 1905 F95
    |--H. uganensis Diels ex Sleum. 1939 F95
    `--H. wollastonii Ridl. 1916 F95

Helicia oreadum Diels 1916 [incl. H. phaeotricha Diels 1916, H. purpurascens Sleum. 1955, H. validinervis White 1922] F95

*Type species of generic name indicated

REFERENCES

[F95] Foreman, D. B. 1995. Proteaceae. In: Conn, B. J. (ed.) Handbooks of the Flora of Papua New Guinea vol. 3 pp. 221–270. Melbourne University Press: Carlton (Australia).

[MM09] Mound, L. A., & M. Masumoto. 2009. Australian Thripinae of the Anaphothrips genus-group (Thysanoptera), with three new genera and thirty-three new species. Zootaxa 2042: 1–76.

Last updated: 27 July 2017.