Daviesia

Taxonomy

Daviesia J.E. Smith Trans. Linn. Soc. London 4: 220. 24 Mai 1798.

Subfamily: Faboideae.
Phylogenetic Number: 3.24.04.
Tribe: Mirbelieae.
Group: Daviesia.
Species Studied - Species in Genus: 22 studied; 120 in genus.

Description

Fruit: A legume; unilocular; 0.5–1.5 cm long; 0.4–1 cm wide; 0.3–0.5 cm thick; length less than twice as long as width to 2–9 times longer than wide; with deciduous androecial sheath; with deciduous corolla; with persistent calyx; with calyx shorter than fruit; without orifice formed by curving of fruit or fruit segments; straight; not plicate; not twisted; more or less asymmetrical; triangular, or irregular; with both sutures unequally curved, or 1 straight and 1 curved suture, or both sutures parallelly curved; more or less widest near middle or D-shaped; not inflated; compressed; without beak, or with beak; with solid beak the same color and texture as fruit; tapered at apex, or short tapered at apex, or truncate at apex; aligned with longitudinal axis of fruit, or oblique with longitudinal axis of fruit, or right-angled with longitudinal axis of fruit; long tapered at base to tapered at base; aligned with longitudinal axis of fruit, or oblique with longitudinal axis of fruit; with the apex and base uniform in texture; membranous, or chartaceous; margin not constricted; margin without sulcus; margin plain; wing(s) absent; substipitate; with all layers dehiscing; splitting along suture(s). Dehiscence of valves along both sutures; apical and down; active; with valves twisting (each valve or both valves forming a cone). Replum invisible. Epicarp dull, or glossy; monochrome, or multicolored; mottled; light to dark or reddish brown, or tan, or green, or purple, or gray; with tan overlay; with surface texture uniform; glabrous, or pubescent and indurate; with hairs erect; with 1 type of pubescence; villous; with pubescence golden; with pubescence uniformly distributed; with simple hairs; pliable; with hair bases plain; eglandular; without spines; smooth, or not smooth; with elevated features; veined; reticulately veined; not tuberculate; not exfoliating; without cracks; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp present; thin; surface not veined; 1-layered; without balsamic vesicles; without fibers; without reniform canals; solid; coriaceous. Endocarp present; visible; dull; opaque; monochrome; brown; smooth, or hairy (crinkled and golden), or cobwebby; without adhering pieces of testa; nonseptate; chartaceous; not exfoliating; remaining fused to mesocarp and epicarp; without wings; entire. Seed(s) 1, or 2; length parallel with fruit length; overlapping and touching, or neither overlapping nor touching; in 1 series. Funiculus 1 mm long; of 1 length only; thick; straight (may be bifurcate at base with seed on each stalk). Aril present; fleshy; when fleshy cupshaped (with thicker apex); entire; covering 1/2 to nearly all of seed; reddish brown, or yellow.

Seed: 3–6 mm long; 1.5–3.5 mm wide; 0.8–2.4 mm thick; overgrown, 1 seed filling entire fruit cavity; not angular; asymmetrical; oblong, or elliptic; compressed; with surface smooth; without visible radicle and cotyledon lobes; without hilar sinus; without umbo on seed faces; without medial ridge on each face. Cuticle not exfoliating; not inflated; not wrinkled. Testa present; without pieces of adhering epicarp; not adhering to endocarp; free from endocarp; glossy; not modified by a bloom; colored; monochrome, or mottled and streaked; with frequent mottles; with frequent streaks; brown to greenish or reddish brown, or tan (to reddish tan), or yellow, or orange, or black; with black overlay; glabrous; smooth, or not smooth; with recessed features; punctate; coriaceous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe not visible. Hilum present; partially concealed; concealed by aril; with faboid split; with the lips of the faboid split the same color as the rest of the hilum; larger than punctiform; 1 mm long; with straight outline; oblong; marginal according to radicle tip; recessed; not within corona, halo, or rim, or within halo; halo darker than testa (black). Lens discernible, or not discernible; with margins curved; elliptic; not in groove of raphe; confluent with hilum (at least with halo); mounded; dissimilar color from testa; darker than testa; black; not within corona, halo, or rim. Endosperm present; thin; not pluglike and not resembling tip of radicle; covering entire embryo; adnate to testa, or embryo. Cotyledons smooth; both outer faces convex; both more or less of equal length; not folded; margin entire 180 degrees from base of radicle; similar at apex; not concealing radicle; split over radicle; with lobes; with the interface division terminating at base of radicle; without margins recessed; yellow; inner face flat; glabrous on inner face. Embryonic axis deflexed; oblique to length of seed; without a joint evident between the radicle and the cotyledons. Radicle differentiated from cotyledon; linear; lobe tip straight; deflexed and parallel to cotyledon length; centered between cotyledons; less than 1/2 length of cotyledons. Plumule rudimentary; glabrous.

Distribution

Australia.

Old World; Australia.

Generic Notes

Crisp (1980, 1982, 1984, 1985, 1991) in a series of papers has treated parts of Daviesia. His 1985 paper dealt with conservation of the genus.

Tribal Notes

Tribe Mirbelieae

Crisp and Weston (1987) analyzed the Mirbelieae, and we are following their species counts. We did not treat the following new taxa of Crisp and Weston: the Pultenaea incurvata A. Cunningham group of five species; Pultenaea neurocalyx P.K.N.S. Turczanivow, a one species group; Aotus phyliocides G. Bentham, a one species group; and, Oxylobium microphyllum G. Bentham, a two species genus. The genus Cupulanthus J. Hutchinson is listed on page 85 of Crisp and Weston (1987) and not mentioned by them again. Crisp and Weston (1995) have continued their phylogenetic studies of Mirbelieae, and proposed two major generic changes, the resurrection of Podolobium R. Brown with six species of Oxylobium (24.09, see Notes for Oxylobium) and a new genus, tentatively to be named Otion. Otion, as projected, will have six species, two new ones and four from four different genera: Aotus phylicoides G. Bentham, Burtonia simplicifolia F.J.H. von Mueller & R. Tate, Oxylobium microphyllum G. Bentham, and Phyllota luehmannii F.J.H. von Mueller.