Quick search (1 word):

 

Flora of Australia Online

Grevillea juniperina R.Br., Trans. Linn. Soc. Bot. 10: 171 (1810)

T: about 7 miles [11.2 km] NW. 1/2 N from Prospect, N.S.W., Oct. 1803, G.Caley ; lecto: BM, fide D.J.McGillivray & R.O.Makinson, Grevillea 423 (1993); isolecto: A n.v. , E n.v. ; remaining syntype: Port Jackson, s.d. , A.Gordon ; syn: ?BM n.v.

Prostrate to erect shrub 0.2–2 (–4) m high, to 3 m across; branches sometimes appearing columnar. Branchlets terete, tomentose to villous. Leaves spreading to ascending, often crowded on short lateral branchlets, usually rigid, narrowly ovate to subulate or linear, 5–35 mm long, 0.5–6 mm wide, usually pungent; upper surface usually with 3–5 longitudinal veins, glabrous or nearly so; margins angularly or rarely smoothly recurved to revolute, rarely ±flat; lower surface often enclosed or almost so, usually densely sericeous or occasionally openly so, rarely glabrous, or open-tomentose. Conflorescence terminal, occasionally also axillary and subterminal, usually simple or occasionally 2 (–4)-branched; unit conflorescence erect or slightly decurved, acropetal, subsecund. Perianth densely to openly subsericeous to tomentose outside, rarely subvillous especially on limb, bearded inside between 2.5 and 9 mm above base. Pistil (15–) 18–27 mm long; style glabrous except for minute scattered erect simple hairs extending from back of style-end down at least 3 mm and sometimes almost to ovary; pollen-presenter usually oblique or occasionally lateral. Follicles narrowly ovoid or oblong-ellipsoidal, 10–18 mm long. 

Occurs from southern Qld through eastern N.S.W. to the Southern Tablelands. 

Despite the number of subspecies and their variation, G. juniperina is not easily confused with other taxa. See under G. molyneuxii for distinctions from that species. Grevillea juniperina has a distinctive leaf lower surface (shared with G. australis ): the midvein is equally as hairy as the adjacent lamina, and usually decreases markedly in prominence from the base towards the apex of the leaf.

Grevillea juniperin a has been an important plant in ornamental horticulture, as selections and as a parent of many hybrids.

Seven subspecies are recognised.

(R.O.Makinson)

1 Limb at apex of flower-bud tomentose or shaggy-subvillous (±spreading hairs); outer surface of perianth tomentose (ascending hairs); lower leaf surface glabrescent or with only a sparse indumentum of strongly ascending hairs, concentrated along midvein

subsp. villosa

1: Limb at apex of flower-bud subsericeous (appressed hairs); outer surface of perianth subsericeous to open-appressed; lower leaf surface densely to openly subsericeous (to almost glabrous)

2

2 Outer surface of perianth with few to many minute erect simple hairs (c. 0.1–0.2 mm long; microscope feature) mixed in with much larger biramous (2-armed) hairs

3

2: Outer surface of perianth lacking minute erect hairs (biramous hairs only present)

4

3 Prostrate to spreading shrub 0.3–0.8 (–1.2) m tall; adult and juvenile leaves both with a dense appressed indumentum over the whole lower surface; juvenile leaves 1/3–1/2 as long as adult leaves (grows on slopes and ridges usually away from streams)

subsp. amphitricha

3: Ascending to erect shrub with erect columnar branches to 2 m tall, or rarely prostrate; adult leaves with a sparse to dense indumentum on lower surface; juvenile leaves as long as adult leaves, with a sparse to open indumentum beneath (grows in moist creek-side and swamp habitats)

subsp. sulphurea

4 Adult leaves elliptic to narrowly elliptic or narrowly ovate; margins angularly and very shortly recurved, with most of lower leaf surface exposed; upper surface ±planar except for 3 (or 5) ±prominent pale veins

5

4: Adult leaves linear, sublinear, or acicular-subulate; margins ±strongly recurved to revolute, concealing much or all of lower leaf surface; upper surface angularly ridged (leaf trigonous or deltoid in cross-section) or smoothly convex, rarely planar on adult foliage, with venation variably conspicuous to obscure; weakly ascending to spreading or erect shrubs to 3 m tall

6

5 Adult leaves 10–20 mm long, 1.5–2.5 mm wide; spreading shrub 0.5–2 m high; flowers usually yellow or orange, rarely red; innermost pair of lateral veins on upper leaf surface joining the midvein abruptly at ±90º at extreme base of leaf

subsp. trinervis

5: Adult leaves (10–) 15–35 mm long, 2–4.5 (–6) mm wide; prostrate shrub or rarely low spreading shrub to 1.2 m tall; flowers usually red, rarely yellow; innermost pair of lateral veins on upper leaf surface joining midvein at acute angle just above leaf base

subsp. allojohnsonii

6 Widest adult leaves < 1 mm broad

7

6: Widest adult leaves ≥ 1 mm broad

8

7 Upper leaf surface with three prominent longitudinal veins; adult leaf angularly deltoid to trigonous in cross-section, not adaxially convex-rounded; leaf margins angularly revolute or refracted; low spreading shrub to 1 (rarely 1.5) m tall

subsp. juniperina

7: Upper leaf surface with only the midvein evident or if intramarginal veins evident then the latter not prominent; adult leaf usually rounded (adaxially convex) in cross-section or sometimes angularly deltoid; leaf margins smoothly to angularly revolute; ascending to erect shrub with columnar branches to 2 m tall, or rarely prostrate

subsp. sulphurea

8 Robust shrub 1–3 m tall, with strong erect central stem at base and many spreading to ascending lateral branches; leaves angularly deltoid to trigonous in cross-section (not smoothly convex); upper leaf surface with 1–3 prominent longitudinal veins; lower surface with a dense appressed indumentum; flowers red or rarely pink

subsp. fortis

8: Sprawling or weakly erect shrub with main branches spreading at ground level and then ascending or erect-columnar, to 2 m tall; leaves usually markedly rounded-convex in cross-section; upper leaf surface with 1–3 veins visible but usually scarcely prominent; lower surface with a dense to sparse appressed indumentum; flowers dull yellow or orange

subsp. sulphurea

 

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