| 1 | Gynophore c. 15 mm long, nearly as long as the style. Hypogynous gland very large. Perianth pale violet to greenish, tinged with pale purple-brown. Leaves narrow-lanceolate, 8–16 cm long, acuminate, 3-veined. Tall shrub or small tree 2–8 m high. North side of the Hawkesbury River. Forest in gullies in Ss. Vulnerable. Fl. spring–summer | G. shiressii |
| 1 | Gynophore less than half as long as the style | 2 |
| 2 | Gynophore almost as thick as ovary, with a tuft of hairs. Leaves narrow elliptic to linear, 0.8–4 cm long, 0.8–3.0 mm wide, sometimes pungent, margins recurved to revolute. Racemes terminal, 4–12 flowered. Perianth glabrous outside, pink and cream, or whole pink, green, yellow, cream or orange. Erect to low spreading shrub to 2 m high. Kowmung and Hartley area. Open forest, woodland and riparian communities. Fl. winter–spring | G. rosmarinifolia ssp. rosmarinifolia |
| 2 | Gynophore glabrous and slender | 3 |
| 3 | Leaves very spreading, linear-subulate, rigid, pungent-pointed, with revolute margins, 1–2 cm long. Racemes very short and umbel-like, terminal, sessile. Perianth silky-pubescent outside, pale yellow and green or red; tube 10–12 mm long. Prickly divaricate shrub 1–2 m high. | 4 |
| 3 | Leaves not as above. Shrubs rarely prickly, sometimes tall. Young branches, undersurface of leaves and inflorescences ± silky hairy | 5 |
| 4 | Upper leaf surface with 3 prominent longitudinal veins. Low spreading shrub to 1 m. Leaves 0.6–0.8 mm wide. Cumberland Plain. Open forest and cleared areas on WS. V. Fl. spring–summer | G. juniperina ssp. juniperina |
| 4 | Upper leaf surface with midvein prominent. Erect shrub to 2m high, rarely prostrate. Leaves 0.6–1.8 mm wide. On sandstone derived solis from Berrima to Tallong and west to Blue Mts. Grows in DSF in moist areas beside creeks. Fl. Winter–spring | G. juniperina ssp. sulphurea |
| 5 | Gynoecium more than 16 mm long, much longer than the perianth tube | 6 |
| 5 | Gynoecium less than 16 mm long, usually less than twice as long as the perianth tube | 8 |
| 6 | Perianth pink, rarely white (near Heathcote), silky pubescent outside; tube 4–8 mm long. Style 10–15 mm long. Racemes dense, short, on short terminal peduncles. Leaves narrow-ovate to almost linear, 1–6 cm long, glabrous or slightly silky hairy above, closely silky tomentose below. Shrub 1–2 m high, branches often angular when young. Widespread. Heath and DSF. Ss. Fl. most of the year | G. sericea |
| 6 | Perianth red, very occasionally pale or even white. Style 20–25 mm long | 7 |
| 7 | Leaves 1–5 cm long, ovate or elliptic to narrow-lanceolate. Racemes almost terminal on lateral branches; peduncles spreading or reflexed, 5–50 mm long. Perianth tube 8–10 mm long. Erect or bushy shrub 1–3 m high. Hornsby Plateau. Heath and DSF. Ss. Fl. most of the year | G. speciosa |
| 7 | Leaves 5–10 cm long, linear to lanceolate. Racemes mostly sessile in the axils of leaves or terminal on very short branches. Perianth tube 8–14 mm long. Erect shrub c. 2 m high. Woronora Plateau; Blue Mts. Heath and DSF. Ss | G. oleoides |
| 8 | Perianth red to almost black or rarely greenish brown. Racemes dense and very short | 9 |
| 8 | Perianth whitish or pale to deep pink, silky pubescent outside | 14 |
| 9 | Limb on late flower buds tomentose to villous, hairs ascending to spreading | 10 |
| 9 | Limb on late flower buds with silky appressed hairs. Never with rusty tomentum on bud limbsor leaves 3-veined | 12 |
| 10 | Leaves 3–veined and pungent pointed, lanceolate to oblong 10–35 mm long, 1.5–6 mm wide. Racemes held +/- erect. Glandular hairs present on outside of perianth. Shrub to 1.2 m high covered with loose shaggy hairs. Mangrove Mt. to Woy Woy. Heath and DSF. Ss. Fl. summer–autumn | G. oldei |
| 10 | Leaves not or scarcely pungent pointed, glandular hairs not present on outside of perianth | 11 |
| 11 | Nectary protruding past receptacle rim. Limb of bud with rusty hairs. Leaves elliptic to obovate, mostly 2.5–6 cm long, 3–10 mm wide. Low dense shrub to 0.5 m high. North-western Blue Mts. Heath and DSF, sometimes in swampy conditions. Vulnerable. Fl. winter–spring | G. evansiana |
| 11 | Nectary scarcely protruding past receptacle rim. Limb of bud with pale hairs (occasionally light brown). Leaves narrow elliptic to lanceolate, 2–9 cm long, 2–8 mm wide. Decumbent shrub to 0.5 m high. Grows in poorly drained areas and swamp margins. Restricted to southern edge of Sydney Basin. Fl. winter–summer | G. capitellata |
| 12 | Branchlets subterete to slightly angular with short hairs. Racemes on subterete peduncles to 10 mm long, scarcely pendent. Style with hairs confined to apex. Leaves elliptic 1.5–5.5 cm long, 2–4 mm wide. Low compact shrub to 0.5 m high. Woronora Plateau. Heath and DSF, Ss.. Fl. winter–summer | G. diffusa ssp. diffusa |
| 12 | Branchlets prominently angular, glabrous or with silky hairs between the ridges. Racemes on angular peduncles more than 10 mm long. Style with hairs covering top half | 13 |
| 13 | Leaves usually more than 7 cm long, 2–4 mm wide, margins bent in towards lower surface. Peduncles slender, 15–40 mm long. Perianth and style scarlet to crimson. Shrub to 1 m high. Calga to Mt. White. Heath and DSF, sometimes in swampy conditions. Fl. spring | G. diffusa ssp. filipendula |
| 13 | Leaves usually less than 7 cm long, 2.5–4 mm or occasionally 7 mm wide, margins recurved. Peduncles 10–15 mm long. Perianth and style dark red to dark burgundy. Shrub 1–2 m high. Waterfall, Helensburgh Georges River area. Often near creeks. Ss. DSF. Fl. winter–spring | G. diffusa ssp. costablei |
| 14 | Leaves rigid with a pungent point, linear to narrow elliptic 2–5 cm long, 1–3 mm wide. Racemes many flowered. Perianth pale pink to dark pink or rarely white. Erect or low spreading shrub to 2 m high. Coastal Plain south form Heathcote. Heath and DSF. Ss. Fl. summer | G. patulifolia |
| 14 | Leaves pliable not or scarcely pungent. | 15 |
| 15 | Gynoecium 4–7 mm long. Racemes with 6–14 flowers. Undersurface of leaf exposed or sometimes enclosed and 2-grooved | 16 |
| 15 | Gynoecium 7–13 mm long. Racemes 10 to many-flowered. | 17 |
| 16 | Major branches ascending to erect. Branchlets not or only occasionally arranged on one side of stem. Leaves 0.8–1.3 mm wide. Gynophore 1–2 mm long. Shrub ≤ 1 m high. West and south of Sydney. Heath and woodlands on shale in sandy or light clay soils. V. Fl. winter –summer | G. parviflora ssp. parvifolia |
| 16 | Major branches ± spreading. Branchlets arranged on one side of stems. Leaves held upright 0.6–2 mm wide. Gynophore 0.5–0.6 mm long. NW of Sydney. Shrub ≤ 1 m high. Heath and woodland, on Ss. in skeletal sandy soils. E. Fl. winter–spring | G. parvifolia ssp. supplicans |
| 17 | Erect to spreading shrub to 1 m high. Leaves ascending, oblong elliptic 3–5 cm long, 1.8–2.5 mm wide, undersurface mostly exposed. Perianth pink occasionally white. Gynoecium 7–10 mm long. Gynophore 1–1.7 mm long. Lower Hunter area and possibly Putty. DSF and heathy woodland. Fl. winter–spring | G. humilis ssp. humilis |
| 17 | Erect shrub 1–3 m high. Leaves spreading to loosely ascending, linear to narrow elliptic, 5–9 cm long, 1–3 mm wide, undersurface mostly enclosed. Perianth white. Gynoecium 7–13 mm long. Gynophore 1.3–1.5 mm long. Widespread. Heath and DSF. Ss. Fl. spring–summer | G. linearifolia |