Schleinitzia Warb. ex J.C. Willis, Dict. Fl. Pl., ed. 4: 594. 1919.
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https://dx.doi.org/10.3897/phytokeys.240.101716 |
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https://treatment.plazi.org/id/E7A99A57-0378-C358-4E04-A6D957F6194A |
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scientific name |
Schleinitzia Warb. ex J.C. Willis, Dict. Fl. Pl., ed. 4: 594. 1919. |
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Schleinitzia Warb. ex J.C. Willis, Dict. Fl. Pl., ed. 4: 594. 1919. View in CoL
Figs 145 View Figure 145 , 146 View Figure 146 , 150 View Figure 150
Type.
Schleinitzia novoguineensis (Warb.) L.I. Nevling & C.J. Niezgoda [≡ Piptadenia novoguineensis Warb.]
Description.
Trees or shrubs, 2-20 (-25) m, unarmed, young stems angled with corky ridges, brachyblasts absent. Stipules acicular to triangular, persistent. Leaves bipinnate; petiole ventrally sulcate, nectary at apex of petiole or mid-petiole, additional nectaries between distal-most and sometimes all pinnae, crateriform to urceolate; pinnae 4-30 pairs, opposite to subopposite; leaflets 20-60 pairs per pinna, opposite, linear to oblong; venation obscure except central midvein. Inflorescence capitate, globose, clustered 2-7 per node in terminal, largely efoliate panicles (Fig. 145E View Figure 145 ), peduncle bearing an involucel of fused bracts below the inflorescence; bracteoles subtending each flower peltate, carinate, semi-persistent. Flowers either all hermaphrodite, all functionally staminate, or functionally staminate proximally and hermaphrodite distally, sterile flowers with staminodia absent, sessile, base of calyx prolonged into a pseudopedicel; hypanthium absent; sepals valvate in bud, calyx obconic, ¾ length of petals; petals valvate, 5, free, membranous, 1-nerved; stamens 10; anthers dorsifixed, bearing a caducous apical claviform gland; pollen in tetrahedral tetrads of tricolporate grains, or [ Schleinitzia megaladenia (Merr.) P. Guinet & I.C. Nielsen] loose polyads of 5 associated tetrads of porate grains; ovary sessile, oblong, glabrous, stigma funnelform. Fruits somewhat upright on stout peduncles, often 5-8 per infructescence, straight, strongly compressed, linear-oblong (Fig. 146J View Figure 146 ), 8-20-seeded, seeds transversely inserted; valves coriaceous, indehiscent, sutural ribs separating but valves remaining attached; epicarp chartaceous, dark brown; endocarp fibrous, smooth, straw-coloured forming partitions between seeds, mesocarp spongy. Seeds narrow ovate to oblong, smooth, testa dark brown to black, pleurogram deeply U-shaped.
Chromosome number.
2 n = 52 or 54 ( Nevling and Niezgoda 1978; Goldblatt 1981b); whole genus apparently paleopolyploid.
Included species and geographic distribution.
Four species disjunctly distributed across the western Pacific basin in New Guinea, the Philippines, Melanesia, Micronesia and Polynesia (Fig. 150 View Figure 150 ).
Ecology.
In lowland rainforests, especially common in secondary vegetation near the coast, and in littoral habitats above high-tide limits on calcareous substrates, especially coral limestone and coral sand, and often forming thickets on coastal beach strands ( Fosberg and Stone 1965).
Etymology.
Named in honour of Vice Admiral George Schleinitz (1834-1910), governor of German New Guinea (now part of Papua New Guinea).
Human uses.
The wood is favoured for cremations, handicrafts and frames for fish nets ( Nevling and Niezgoda 1978).
Notes.
Schleinitzia is characterised by a fused whorl of bracts subtending the capitate inflorescence, similar to those of Kanaloa and Leucaena . Pollen in calymmate tetrahedral tetrads is also seen in Lemurodendron , Leucaena and Mezcala . Schleinitzia differs from related genera in having the flowers borne on pseudopedicels instead of being sessile.
Taxonomic references.
Nevling and Niezgoda (1978), including illustrations.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.