identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03B83B3DFFD0FF85FF5DF9D6FD7E8C90.text	03B83B3DFFD0FF85FF5DF9D6FD7E8C90.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Psychotria apdavisiana W. N. Takeuchi. A 2013	<div><p>Psychotria apdavisiana W.N.Takeuchi, sp. nov. (Figs. 1–3)</p> <p>Affinis Psychotriae reflexapedunculatae Sohmer sed stipulis majoribus usque ad 18–31 mm longis (nec 5 mm longis) infructescentiis capitatis (nec ramosis) differt.</p> <p>Type: — PAPUA NEW GUINEA. Western Province: Strickland drainage, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=142.43724&amp;materialsCitation.latitude=-5.8999" title="Search Plazi for locations around (long 142.43724/lat -5.8999)">Juha South</a>, survey track 1 to sinkhole area, mossy montane forest, 5°53.994'S, 142°26.234'E, 910 m, 21 February 2008, Takeuchi, Gambia &amp; Jisaka 23261 (holotype A!; isotypes K!, LAE!).</p> <p>Subshrubs to 0.6 m tall, monoaxial (rarely once-branched). Stems compressed, planate or angulate, 2–4.5 mm wide, pithy; surfaces longitudinally wrinkled, furrowed or not, nigrescent to brunnescent, dull, without lenticels, abscission scars absent; indument velutinous, reddish brown, subpersisting; internodes 2–7.5 cm long. Leaves cauline, 3–5 pairs (or with 1 pair on a side branch), equal, obliquely spreading; stipules ovate, 18–31 × 18–22 mm, parted to the middle, paired, free, persisting, venose, conspicuously thickened at the base, distally papery, bifacially tomentose-lanate, margins glabrescent, apical lobes acute, 9–15 × 3–9 mm; petioles (10–)18–30 × 1–2 mm, planoconvex, striate, black, not articulated, indument as for the stem, hairs caducous on upper side, persisting underneath; leaf-blades chartaceous, narrowly obovate, 16.3–25.2 × 5.9–10.7 cm; base cuneate-attenuate, symmetrical, poorly delimited from the petiole or not; margin entire; apex acuminate (acumen to ca. 2.5 × 1 cm); lamina surfaces adaxially fuliginous, glabrescent, abaxially brunnescent to orange-brown, hirtellous on veins, appressedly hairy between veins; cystoliths linear, discolorously pale, infrequent; domatia absent; venation camptodromous, secondary veins 10–15 per side, at the lamina center with divergence angles of (45–)60–85°, 9–17(–25) mm apart, gradually curved toward margins, only rarely uniting by commissural loops; tertiary (crossing) nerves subscalariform, reticulum irregular, coarsely areolate, obscure or invisible; midribs prominulous on both sides; higher order venation weakly raised or planate above, more raised beneath. Flowers not seen. Infructescence terminal (or from upper axils), solitary, 6–8.5 × 2.5–3.5 cm, capitate; peduncle 45–62 × 1.2–2.5 mm, reflexed at the base, compressed or subcylindrical, black, shaggy; bracts filiform, 4–12 × 0.1–0.8 mm, gathered in an apical mass beneath the fruits, subappressedly- or crispate-hairy. Drupes ellipsoid–obovoid, (9–)12–14 × 5–8 mm (exclusive of calyx), sessile, congested, 3–9 together in a spherical head to 3.5 cm diameter, hidden by bracts at the base, crowned by the calyx residue; exocarp jet black to reddish brown, usually set with pale raphides; fruiting sepals 5–6, free, linear, 6–7 × 0.8– 1 mm, ascending or curled, sparsely pilosulous; pyrenes 2, hemispherical; endocarp crustaceous, obtusely ridged on the back, commissural face slightly concave; preformed germination slits 2, marginal, extending halfway to the apex; seed without ethanol soluble pigments; endosperm ruminate.</p> <p>Etymology: — Psychotria apdavisiana is named after A.P. Davis (Royal Botanic Gardens, Kew), a prominent contributor to our present understanding of the Psychotrieae.</p> <p>Field characters: —Understory subshrubs perched on limestone boulders, 40–60 cm tall, erect; leafblades fleshy, bifacially dull green; peduncles reflexed; fruits globular or obovoid, 14–20 mm diameter in vivo, sessile, asymmetric, spongious, dull white, exocarp often dimpled.</p> <p>Distribution: —Endemic to uninhabited uplands in the Strickland drainage of Western Province (Fig. 4 A).</p> <p>Habitat and ecology: —Epilithic on limestone in perhumid montane forest, 910 m.</p> <p>Phenology: —Fruiting in February.</p> <p>Notes: —The new species is a miniature monocaul with tightly reflexed peduncles. Among Papuasian congeners, only Psychotria reflexapedunculata Sohmer (1988: 252) has this bizarre combination of features, but the capitate infructescence of P. apdavisiana is instantly distinguishing.</p> <p>The unusually filiform calyces of the new Psychotria also recall P. phaeochlamys (Lauterbach &amp; Schumann 1901: 581) Valeton (1927: 95), a congener with a similar headlike inflorescence but lacking a peduncle, and with red-colored drupes (not white). Any similarity with this latter species is probably superficial (Fig. 5).</p> <p>Although one plant was seen with an axillary peduncle (apparently resulting from apical growth after flowering; Fig. 1 A) the new species is undoubtedly a Psychotria as defined by current interpretation of the Psychotrieae (in Davis &amp; Bridson 2001, 2004, Davis et al. 2001, Sohmer &amp; Davis 2007, Barrabé et al. 2012). Diagnostic support for the generic assignment is indicated by the paired pyrenes with marginal germination slits (2) on endocarps.</p> <p>Numerous novelties are being revealed by recent surveys of PNG's interior karst environments—many with exceptional qualities enabling immediate determination as nova. The continuing discoveries are a convincing corroboration of conservation estimates regarding limestone environments in the southern ranges (e.g., Beehler 1993, Sekhran &amp; Miller 1994).</p></div> 	https://treatment.plazi.org/id/03B83B3DFFD0FF85FF5DF9D6FD7E8C90	Public Domain	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.		Plazi	Takeuchi, Wayne	Takeuchi, Wayne (2013): Psychotria apdavisiana sp. nov. (Rubiaceae), a remarkable calciphile from the southern karst of Papua New Guinea. Phytotaxa 153 (1): 51-57, DOI: 10.11646/phytotaxa.153.1.3, URL: http://dx.doi.org/10.11646/phytotaxa.153.1.3
