Seeds of South Australia
Hibbertia sessiliflora (Dilleniaceae)
Sessile Guinea-flower.
List of species for Hibbertia
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Seed collecting:
December to February
Herbarium region:
South Eastern
NRM region:
South East
IBRA regions
Lucindale (NCP03)Naracoorte Coastal Plain
 Endangered   (IUCN: EN B2ab(i,ii,iii,iv,v))   (Probable Decline)   [in Johanna; new spp endemic to SE]
Wimmera (MDD05)Murray Darling Depression
 Endangered   (IUCN: EN B2ab(i,ii,iii,iv,v))   (Probable Decline)   [in Johanna; new spp endemic to SE]
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Hibbertia]
Name derivation:
Hibbertia named after George Hibbert (1757-1837), a London merchant who maintained a private botanic garden at Chelsea. Sessiliflora from the Latin 'sessilis' meaning low or fixed and 'florus' meaning flower; referring to the many flowers along the stem which appear to be sessile as they are borne on very short short shoots.
Distribution:
Found in the south-east in South Australia, growing on winter-wet clay flats under scrub vegetation. Also found in Victoria.
Status:
Native. Very rare in South Australia. Rare in Victoria.
Plant description:
Shrublets with erect to decumbent woody stems to 0.5 m long and with spreading hairy, wiry branches with internodes up to 2.3 cm long and reddish-brown becoming greyish. Leaves with axillary tuft of hairs, petiole to 0.6 mm long. Leaves linear-elliptic to rarely -lanceolate or elliptic, to 9.6 mm long and 3.2 mm wide, gradually constricted into blunt apex with tuft of simple hairs and into short petiole, discolorous, above convex and with scattered stellate hairs under simple hairs soon glabrescent, below with narrow to broader recurved to revolute margins well raised above the narrow central vein and stellate-tomentose with scattered longer simple hairs mainly on the central vein. Flowers mid to bright and deep yellow, sessile, terminal on mainly short shoots often with only reduced leaves and 3 more densely hairy bracts to 1.5 mm long or up to quarter of the calyx. Flowering between October and November.
Fruit type:
Brown capsule with 2 carpels, woolly, with styles each attached to the dorsal apex.
Seed type:
Brown, globular seed to 2 mm diameter.
Seed collecting:
Collect mature capsules, those that are turning a pale straw colour and contain brown seeds.
Seed cleaning:
Place the capsules in a tray and leave to dry for one to two weeks. Then rub the capsules gently by hand to dislodge the seeds. Use a sieve to separate the unwanted material. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place.
Seed viability:
This genus tend to have low seed viability.
Seed germination:
This species has morphophysiological dormancy and can be difficult to germinate.