Luetzelburgia

Taxonomy

Luetzelburgia H.A.T. Harms Ber. Deutsch. Bot. Ges. 40: 177. Jun 1922.

Subfamily: Faboideae.
Phylogenetic Number: 3.2.03.
Tribe: Sophoreae.
Group: Myroxylon.
Species Studied - Species in Genus: 2 studied; 6 in genus.

Description

Fruit: A legume; unilocular; 7–9 cm long; 2.5–2.9 cm wide; 0.5–0.9 cm thick; 2–9 times longer than wide; with deciduous androecial sheath; with deciduous corolla; with deciduous calyx; without orifice formed by curving of fruit or fruit segments; straight; not plicate; not twisted; asymmetrical; samaroid; with both sutures unequally curved; not inflated; flattened; without beak; rounded at apex; aligned with longitudinal axis of fruit, or oblique with longitudinal axis of fruit; rounded at base to short tapered at base; aligned with longitudinal axis of fruit, or oblique with longitudinal axis of fruit; with the apex and base uniform in texture; coriaceous; seed chambers externally visible; margin not constricted; margin without sulcus; margin plain, or embellished; margin with wing(s); wing(s) present; wing(s) 1; wing(s) 45–60 mm wide; wing(s) samaroid; wing(s) apical; substipitate; indehiscent. Epicarp dull; monochrome, or multicolored; mottled; brown; with tan overlay; mottling color combination constant; with surface texture uniform; pubescent and indurate; with hairs erect, or appressed; with 1 type of pubescence; sericeous to villous; with pubescence golden, or white; 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; without cracks; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp present; thin; 1-layered; without balsamic vesicles; without fibers; without reniform canals; mealy; chartaceous. Endocarp present; visible; dull; opaque; monochrome, or bichrome; tan, or tan and brown, or white (creamy), or brown; smooth, or smooth and scurfy; without adhering pieces of testa; nonseptate; chartaceous; not exfoliating; remaining fused to mesocarp and epicarp; with wing(s) extending into epicarp; entire. Seed(s) 1; length parallel with fruit length. Funiculus filiform; straight. Aril absent.

Seed: 10–22 mm long; 7.5–12.5 mm wide; 3.5–4.5 mm thick; not overgrown; not angular; asymmetrical; irregular; compressed; with surface wrinkled; 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; dull; not modified by a bloom; colored; monochrome; brown, or orange; glabrous; smooth; chartaceous. Pleurogram absent. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe visible, or not visible; from hilum through lens and base of seed to point opposite hilum; not bifurcating; color of testa, or lighter than testa; brown; raised. Hilum present; partially concealed, or fully concealed; concealed by funicular remnant; without faboid split; larger than punctiform; 0.5–1 mm long; with curved outline, or straight outline; elliptic; oblong; apical according to radicle tip but marginal according to seed length; flush; not within corona, halo, or rim. Lens discernible; 0.5–2 mm long; with margins straight; triangular; not in groove of raphe; confluent with hilum; flush; same color as testa, or similar color as testa; darker than testa; brown; not within corona, halo, or rim. Endosperm absent. Cotyledons not smooth; wrinkled; both outer faces convex; both the same thickness; both more or less of equal length; not folded; margin entire 180 degrees from base of radicle; similar at apex; not concealing radicle; notched at radicle; without lobes; with the interface division terminating at base of radicle; without margins recessed; brown; inner face flat; glabrous on inner face. Embryonic axis right angled; perpendicular to length of seed; without a joint evident between the radicle and the cotyledons. Radicle differentiated from cotyledon; linear; lobe tip straight; oblique to cotyledons; centered between cotyledons; less than 1/2 length of cotyledons. Plumule rudimentary; glabrous.

Distribution

Brazil.

New World; South America (Brazil); Brazil.

Tribal Notes

Tribe Sophoreae

Polhill (1981b) stated that the Sophoreae s.l. is a tribe of convenience between the Caesalpinioideae and the bulk of the Papilionoideae, sharply defined from neither. He transferred four genera from Sophoreae into the Swartzieae (1), Amburana (3.1.15), Ateleia (3.1.13), Cyathostegia (3.1.14), and Holocalyx (3.1.12), following Herendeen's (1995) cladistic analyses. Herendeen performed cladistic analyses for all Swartzieae genera, sensu Cowan (1981), 19 Sophoreae genera, and three Caesalpinioideae genera. He concluded that Swartzieae is polyphyletic and that it should be disbanded and its genera transferred to Sophoreae. Preliminary rbcL data (Doyle et al. 1997) supported his conclusions.