Geniostoma clavigerum A.C.Sm. & Stone
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Authority
Smith, Albert C. & Stone, Benjamin C. M. 1962. Studies of Pacific Island Plants, XVII: The Genus Geniostoma (Loganiaceae) in the New Hebrides, Fiji, Samoa, and Tonga. Contr. U. S. Natl. Herb. 37, Part I: 1-41; plates 1-3.
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Family
Loganiaceae
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Scientific Name
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Type
Type in the herbarium of the Bernice P. Bishop Museum, collected on slopes near the base of Mt. Nanggaranambuluta [Lomalangi], near Nandarivatu, Province of Mba, Viti Levu, Fiji, alt. 1,050 meters, in November 1927, by J. W. Gillespie (No. 3916). Duplicate at UC.
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Description
Latin Diagnosis - Arbor parva ad 10 m. alta praeter corollae partem interiorem omnino glabra, ramulis subteretibus apicem versus 1-2 mm. diametro; stipulis intrapetiolaribus in vagina rotundata 1-1.5 mm. alta conjunctis; foliis comparative parvis, pctiolis 5-9 mm. longis non alatis, laminis chartaceis ovatis vel elliptico-ovatis, 3-8 cm. longis, 1-3.6 cm. latis, basi obtuso-cuneatis, apice acutis vel subacuminatis, margine integris, costa supra paulo sulcata subtus elevata, nervis secundariis utrinsecus 5-9 utrinque prominulis, venulis obscuris; inflorescentiis axillaribus dichasialibus 3-5 (-9)-floris, pedunculo communo ad 1 mm. longo apice bibracteato, axibus secundariis 1-5 mm. longis ad nodos bibracteatis, pedicellis 1-5 mm. longis infra calycem dilatatis et bracteolatis, bracteis bracteolisquo anguste ovatis 0.4-1 mm. longis; floribus (visis videtur hermaphroditis) in dichasiis trifloris dispositis; calyce cupuliformi, lobis ovatis 1-1.5 mm. longis acutis minute ciliolatis 3-5-nervatis; corolla breviter tubulosa extus glabra 4-5 mm. longa, tubo 2-2.5 mm. longo intus basim versus glabro faucibus pilis albis reflexis circiter 0.6 mm. longis hirtello, lobis eroctis vel subpatentibus glabris vel basi parce pilosis, nervatio subsimplice, corollae quoque loba nervo unico inconspicuo per tubum adscendente et fere faucibus cum nervulis utrinque 2 lateralibus praedita, nervulis in lobas adscendentibus haud vel obscure ramulosis; staminiuin filamentis ligulatis, antheris anguste ovoideis circiter 1 mm. longis; ovario depresso-globoso diametro circiter 1 mm., stylo filiformi 1-1.2 mm. longo, stigmate clavato obovoideo vel ellipsoideo circiter 1 mm. longo papilloso; capsula ellipsoidea vel ovoidea 9-10 mm. longa apiculata.
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Discussion
Geniostoma clavigerum is very close to the preceding, G. confertiflorum, and appears to be a smaller-leaved, smaller-cymed plant. The more complex corolla-venation distinguishes the species, but the smaller leaves and fewer-flowered cymes also appear to be constant. The relatively large flowers and clavate stigmas (whence the name), as well as the corolla-venation, are features which distinguish this species from its other Fijian congeners.