Painteria

Taxonomy

Painteria N.L. Britton & J.N. Rose N. Amer. Fl. 23: 35. 11 Feb 1928.

Subfamily: Mimosoideae.
Phylogenetic Number: 2.5.13B.
Tribe: Ingeae.
Species Studied - Species in Genus: 2 studied; 3 in genus.

Description

Fruit: A legume; unilocular; 5.5–11.5 cm long (Barneby and Grimes, 1996Barneby and Grimes, 1996:
Albizia, and allies. Mem. New York Bot. Gard. 74(1): 1&-292. ); 1–2 cm wide; 0.4–0.8 cm thick; 2–9 times longer than wide; with deciduous androecial sheath; with deciduous corolla; with deciduous calyx; with orifice formed by curving of fruit or fruit segments, or without orifice formed by curving of fruit or fruit segments; curved, or 0.5-coiled to 1-coiled, or straight (rarely); not plicate; not twisted; asymmetrical, or symmetrical (rarely); coiled, or falcate, or oblong (rarely); with both sutures parallelly curved; not inflated; compressed; with beak (short); straight; with solid beak the same color and texture as fruit; long tapered at apex to tapered at apex, or rounded at apex (rarely); aligned with longitudinal axis of fruit; long tapered at base to tapered at base; aligned with longitudinal axis of fruit; with the apex and base uniform in texture; coriaceous to leathery; seed chambers externally visible; seed chambers with the raised seed chambers not torulose, or torulose; margin constricted, or not constricted; margin constricted along both margins, or constricted only on 1 margin; margin without sulcus; margin plain; wing(s) absent; substipitate; with the stipe 3–6 mm long; with all layers dehiscing; splitting along suture(s). Dehiscence of valves along both sutures; passive. Replum invisible. Epicarp dull; monochrome; black to brown to gray; with surface texture uniform; pubescent and indurate; with hairs erect; with 1 type of pubescence; densely puberulent to puberulent, or pilose (shortly so); with pubescence brown, or gray; with pubescence uniformly distributed, or pubescence denser near sutures, sparser centrally (with age); with simple hairs (straight); pliable; with hair bases plain; eglandular; without spines; not smooth; with elevated features; weakly veined; longitudinally veined relative to fruit length to obliquely veined relative to fruit length; not tuberculate; not exfoliating; with cracks; cracking irregular; without embedded tissue, much thicker than epicarp, running from base to apex. Mesocarp absent. Endocarp present; visible; dull; opaque; monochrome; brown, or tan; smooth; without adhering pieces of testa; nonseptate; chartaceous; not exfoliating; remaining fused to epicarp; without wings; entire. Seed(s) 4–10 (Barneby and Grimes, 1996); length parallel with fruit length; neither overlapping nor touching; in 1 series. Funiculus 2–5 mm long; of 1 length only; filiform, or flattened; convoluted, or curved and straight (but not S-curved). Aril absent.

Seed: 7.5–11 mm long (Barneby and Grimes, 1996Barneby and Grimes, 1996:
Albizia, and allies. Mem. New York Bot. Gard. 74(1): 1&-292. ); 7–9 mm wide (Barneby and Grimes, 1996); 3–4 mm thick (Barneby and Grimes, 1996); not overgrown; not angular; symmetrical; circular, or obovate, or rhombic; compressed; with surface smooth; without visible radicle and cotyledon lobes; with shallow hilar sinus, or 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, or glossy; not modified by a bloom; colored; monochrome; dark brown; glabrous; smooth; coriaceous. Pleurogram present; ca. 90 %. Pseudopleurogram absent. Fracture lines absent. Rim absent. Wing(s) absent. Raphe not visible. Hilum present; fully concealed; concealed by funicular remnant; without faboid split (assumed); punctiform, or larger than punctiform; 0.2–0.5 mm long; with curved outline; circular; apical at apex of radicle tip; flush; not within corona, halo, or rim. Lens discernible; 0.4–0.5 mm long; with margins straight, or curved; linear; ovate; not in groove of raphe; confluent with hilum, or adjacent to hilum; 0–0.1 mm from hilum; mounded, or flush; dissimilar color from testa; lighter than testa; white; not within corona, halo, or rim. Endosperm absent. Cotyledons smooth; 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; completely concealing radicle, or partially concealing radicle; split over radicle; with lobes; with lobes overlapping; with basal groin formed by lobes; with the interface division terminating at base of radicle; without margins recessed; brown; inner face flat; glabrous on inner face. Embryonic axis parallel; parallel to length of seed; without a joint evident between the radicle and the cotyledons. Radicle differentiated from cotyledon; triangular; lobe tip straight; straight with embryonic axis; centered between cotyledons; 1/2 to nearly length of cotyledons. Plumule well developed; glabrous.

Distribution

Generic Notes

Barneby and Grimes (1996) distinguished this genus from Havardia (2.5.13) by "tougher-walled, falcately recurved pods, and by straight or sinuous but not distally sigmoid seed-funicles." Their species count and distribution were used.