Grevillea umbellulata Meisn.

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Meisner, C.D.F. in Lehmann, J.G.C. (ed.) (1848), Proteaceae. Plantae Preissianae 2(2-3): 252

Nomenclature

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Makinson, R.O. in Wilson, A.J.G. (ed.) (2000), Grevillea. Flora of Australia 17A: 333-334, Map 316
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 NSL
taxonomic synonym: Grevillea acerosa F.Muell.: 333
taxonomic synonym: Grevillea umbellulata subsp. acerosa (F.Muell.) Olde & Marriott: 333
  Makinson, R.O. in Wilson, A.J.G. (ed.) (2000), Grevillea. Flora of Australia 17A: 333-334, Map 316
 APC
 NSL
taxonomic synonym: Grevillea acerosa F.Muell.: 333
taxonomic synonym: Grevillea umbellulata subsp. acerosa (F.Muell.) Olde & Marriott: 333

Specimens

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Description

Shrub 0.3-1.5 m tall. Leaves linear-subterete to narrowly elliptic, 0.7-5.0 cm long, 0.6-3.5 mm wide; margins revolute; upper surface smooth, glabrous or nearly so; lower surface often enclosed including midvein and then 1-grooved, silky to sublanate when exposed. Unit conflorescence subumbelloid, acropetal. Flowers adaxially acroscopic. Flower colour: perianth with white to cream hairs, often tinged pale grey or pink, also with brownish hairs outside especially at base and on limb; style similar, lacking brown hairs. Perianth villous outside and inside, persistent in fruit. Pistil 5.5-8 mm long, villous; style-end lacking a terminal appendage; pollen-presenter ±lateral, broadly elliptic to round in face view, flat-conical with a narrow rim. Follicle narrowly obloid-ellipsoidal to ovoid, 8-12 mm long, loosely villous, faintly ridged.

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Phenology

Flowers July-Nov.

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Distribution

Occurs in south-western W.A., where widely distributed from Mt Lesueur S and SE to New Norcia, Wongan Hills, Merredin, Hyden, Newdegate and Ravensthorpe, rare towards Wagin, Busselton and Manjimup, and with a northern occurrence at Port Gregory.

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Habitat

Grows in various habitats including Wandoo or Marri woodlands, mallee scrub and low heath, in sandy or gravelly soils on granite or laterite, often in low moist sites.

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Representative Herbarium Specimens

W.A.: Kukerin, M.Koch 2194 (MEL, PERTH); Merredin, M.Koch 2844 (CANB, K, MEL, NSW); 19.3 km E of Jerramungup, K.Newbey 480 (PERTH); Waraninooka, Port Gregory, A.Oldfield 381 (MEL); 3.2 km NE of Wongan Hills, 13 Sept. 1968, M.E.Phillips CBG040462 (AD, CANB, NSW).

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Nomenclature and Typification

Swan R., W.A., J.Drummond, 2nd Coll. 324 ; lecto: NY n.v. , fide D.J.McGillivray & R.O.Makinson, Grevillea 446 (1993); isolecto: A n.v. , BM, CGE n.v. , G, K, LD n.v. , LE n.v. , MEL, NY n.v. , P n.v.

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Notes

Regenerates from seed and often lignotuber.

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There is considerable variation in habit and leaf orientation, size, margin recurvature, rigidity and pungency. Populations in the N of the range (NW from about Wongan Hills) are fairly consistent in having most leaves > 2.5 cm long, ±pliable and often not pungent, the margins loosely recurved to revolute with the lower surface often partly exposed; the inflorescences with peduncles 2-5 mm long; and a habit to about 1.5 m tall. These are here recognised as the 'northern form', although corresponding phenotypes also occur sporadically in the southern part of the range; the Type collection appears to be assignable to this form. Plants from the Mogumber area fall within this group except in having conspicuously long peduncles (5-30 mm long); these are designated, following Olde & Marriott (Grevillea Book 3: 212 (1995)) as the 'Mogumber form'. Southern populations with narrow rigid strongly revolute leaves have in the past been grouped under G. acerosa F.Muell., more recently ranked as G. umbellulata subsp. acerosa by Olde & Marriott (Grevillea Book 1: 184 (1994)), who circumscribe it as having a habit 30-50 cm tall, most leaves 1.0-1.8 cm long and linear-subterete with strongly revolute margins enclosing the whole lower surface, pungent leaf apices, and peduncles up to 2 mm long. This 'acerose form' phenotype is distinctive, but intermediates and intergrades are so widespread that its biological separation is doubtful; formal recognition is not followed here. Many populations and individual plants in mixed populations S from Hyden and Dumbleyung do correspond with the circumscription, but many do not, with intermediates and several apparently mixed populations in the Kellerberrin to Meckering area. Further research is definitely warranted.

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Illustrations

P.M.Olde & N.R.Marriott, Grevillea Book 3: 212 (top centre & 173A, B, all as subsp. umbellulata ), 213 (centre left & 174A, B, all as subsp. acerosa ) (1995).

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Source

Data derived from Flora of Australia Volumes 16 (1995), 17A (2000) and 17B (1999), products of ABRS, ©Commonwealth of Australia

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© Copyright Commonwealth of Australia, 2024
Last updated: System; Feb 20, 2020 12:41 Status: Legacy

Author - R.O.Makinson

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Cite this profile as: R.O.Makinson. Grevillea umbellulata, in (ed.), Flora of Australia. Australian Biological Resources Study, Department of Climate Change, Energy, the Environment and Water: Canberra. https://profiles.ala.org.au/opus/foa/profile/Grevillea%20umbellulata [Date Accessed: 19 September 2025]