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222 FIELDIANA: BOTANY, VOLUME 28 Phoradendron karuaianum Steyermark, sp. nov. Frutex paras it icus furcatus, ramis oppositis pseud odichotomis vel cymosis teretibus, ad omnes nodos cataphyllis suffultis; internodiis 3-4 cm. longis; cataphyllis late deltoideo-triangularibus supra nodos 0.5-2 cm. insertis; foliis oppositis paullo falcatis vel symmetricis la nee ola to-elliptic is vel elliptico-ovatis basim versus et ad apicem sensim attenuatis, laminis 5-8 cm. longis, 1-3.5 cm. latis, in stato sicco minute ruguloso-verruculosis, palmatim 3-nervosis basinerviis; nervis inconspicuis non elevatis; petiolis 2-4 mm. longis alatis; spicis axillaribus ad nodos plerumque solitariis tenuibus 2-3 cm. longis, 1.5-2 mm. crassis cataphyllorum, jugis 3 et articulis 3 tenuibus gerentibus; pedunculis 2-3 mm. longis; articulis 3 et 5-8 mm. longis, 12-16-floris, prophyllis superne minute papillatis; floribus 2-seriatis: masculis minoribus, in diametro 1-1.1 mm. ad quoquem articulura infra flores foe rain ineas; foemineis raajoribus, in diametro 1.5-1.7 mm.; baccis oblongis laevibus 4 mm. longis, 2.5 mm. latis. Type in herb. Chi. Nat. Hist. Mus., collected in dense forest at base of Cerro along Rio Karuai, Ptari-tepuT, state of Bolivar, alt. 1220 m., November 27, 1944, Julian A. Steyermark 60659. Local name: "atapi". This is an exceptional species, belonging to the Dichotomae group, and apparently related to P laxiflorum Ule of Amazonas, Brazil, from which it differs in its thicker, longer, less-pointed leaves and more densely-flowered spikes. From P. Jenmani Trel. it differs in the pointed leaves and more densely many-flowered spikes. Furthermore, from some members of section Chrysocarpae it differs from P. haitense Urban in the broader, shorter blades, oblong fruits, and more densely-flowered spikes. It is well characterized by the combination of densely-flowered slender spikes, the flowers in two ranks, the oblong fruits, and the palmate ly-nerved thickish leaves. Phoradendron ptarianum Steyermark, sp. nov. Frutez parasiticus, ramis oppositis dichotomis teretibus dioicis; cataphyllis tantum ad nodos basales ramulorum 1-jugis sterilibus late deltoideo-triangularibus, 1.5 mm. longis, supra nodos 1.5-4 cm. insertis; foliis oppositis crasso-coriaceis paullo falcatis ellipticolanceolatis vel oblanceolato-oblongis basi angustatis, apice rotundatis vel obtusis, laminis 7-10 cm. longis, 1.5-4 cm. latis, in sicco minute ruguloso-verruculosis aereo- vel olivaceo-viridibus, marginibus plerumque albicantibus, penninerviis, nervis lateralibus inconspicuis; petiolis 12-25 mm. longis; spicis axillaribus ad nodos nonnullis olivaceo-viridibus, 1.2 cm. longis, 2-2.5 mm. crassis, cataphyllorum jugis 3-4 et articulis 4-5 gerentibus; pedunculis 2-3 mm. longis; articulis 4-5 et 5-6 mm. longis, 3 mm. latis, clavatis, 24-30- floris, floribus masculis (tantum visis) verticillatis 6-seriatis trimeris.
BOTANICAL EXPLORATION IN VENEZUELA - I 223 Type in herb. Chi. Nat. Hist. Mus., collected on forested southfacing slopes overlying sandstone, on "Cave Rock" above "Cave Camp", Ptari-tepui, state of Bolivar, alt. 1810 m., October 29, 1944, Julian A t Steyermark 59483, "parasite on shrub; leaves coriaceous, bronze to olive green both sides; spikes or rachis dull olive green; stem terete, dull green". From P. undulatum (Pohl) Eichler this species differs in its dioecious habit, longer petioles, prevailingly obtuse blades, and in the minutely papillate or suberose, instead of ciliolate, margins of the cataphylls. From P. Uleanum Steyerm. (P. macrophyllum Ule, not Cockerell)* of Mount Roraima, it differs in the obtuse, usually narrower blades, longer petioles, and crowded staminate flower spikes. Phoradendron tepuianum Steyermark, sp. nov. Frutex parasiticus furcatus, ramis oppositis dichotomis teretibus dioicis; internodiis 4-7 cm. longis; cataphyllis tantum ad nodos basales ramulorum 1- jugis sterilibus late deltoideo-triangularibus, 1 mm. longis, supra nodos 9-12 mm. insert is; foliis oppositis crassocoriaceis late obovatis vel elliptic o-obovatis basi subito attenuatis, apice rotundatis, laminis 3-6 cm. longis, 3-5 cm. latis, in sicco minute ruguloso-verruculosis aereo-olivaceo-viridibus novellis apicalibus leviter penninerviis adultis costa tantum basi manifesta, costae residuo et nervis lateralibus plerumque obsoletis; petiolis 7-10 mm. longis; spicis axillaribus ad nodos nonnullis lutescentiviridibus 2.5-5 cm. longis, 4-5 mm. crassis cataphyllorum jugis 4-5 et articulis 5 gerentibus; pedunculis 1-3 mm. longis; articulis 5 et 3-10 mm. longis, 2.5-5 mm. latis, clavatis, 10-16-floris, prophyllis 3-4 mm. longis apice papilla to-cilio latis, floribus foemineis (tantum visis)4- vel 4+2-seriatis; baccis oblongo-ovoideis 5 mm. longis. Type in herb. Chi. Nat. Hist. Mus., collected on dry sandy and rocky sandstone exposures on level ground adjacent to swamp on plateau-portion of south east- facing slopes, Ptari-tepui', state of Bolivar, alt. 1600 m., November 1, 1944, Julian A. Steyermark 59688, "parasitic on shrubs; leaves coriaceous, bronze olive-green; rachis and flowers yellow-green". Apparently a member of section Penninerviae and related to P. Northropiae Urban of the Bahamas and to P. Warmingii Eichl. of Brazil. From the latter it differs in the terete stems and more numerous joints of the flowering spikes, while from the former it differs in the stouter, longer spikes and stouter branches. In some respects this new species resembles P. Macbridei Standl. of Peru, but that 'Phoradendron Uleanum Steyermark, nom. nov. Phoradendron macrophyllum Ule, Notizbl. Bot. Gart. Berl. 6: 291. 1915, not Phoradendron macrophyllum Cockerell, Am. Nat. 34: 293. 1900.
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o 2 CM XI E> RAR.Y OF THL UNIVERSIT
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FIELDIANA: BOTANY A Continuation of
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NUMBER 1 LIST OF ILLUSTRATIONS TEXT
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PAGE 67. Emmotum ptarianum 342 68.
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CONTRIBUTIONS TO THE FLORA OF VENEZ
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BOTANICAL EXPLORATION IN VENEZUELA
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