Cladocolea spathiflora Galván-Gonz., Cerros, Espejo & López-Ferr., 2017

Galván-González, Luis Gil, Cerros-Tlatilpa, Rosa, Espejo-Serna, Adolfo & López-Ferrari, Ana Rosa, 2017, Cladocolea spathiflora (Loranthaceae) a new species from Guerrero, Mexico, Phytotaxa 308 (2), pp. 295-300 : 295-299

publication ID

https://doi.org/ 10.11646/phytotaxa.308.2.12

persistent identifier

https://treatment.plazi.org/id/03DEFE6A-FFE6-D53E-FF56-FF08682AF932

treatment provided by

Felipe

scientific name

Cladocolea spathiflora Galván-Gonz., Cerros, Espejo & López-Ferr.
status

sp. nov.

Cladocolea spathiflora Galván-Gonz., Cerros, Espejo & López-Ferr. View in CoL , spec. nov. Fig. 1 View FIGURE 1 , Fig. 3 A, D, G, J, M View FIGURE 3

Cladocolea spathiflora is similar to C. grahamii (Bentham) van Tieghem , and C. pringlei Kuijt from which it differs by its flowers associated to a spathaceous receptacle formed by the fusion of pedicel and floral bract.

Type:— MEXICO, Guerrero: municipio de Eduardo Neri: 3.1 km al SW de El Miraval, carretera federal Miraval a Filo de Caballos, 2,159 m.a.s.l., 17°42’31.2“N, 99°46‘32.7“W, 20 April 2017. L. G. Galván G., R. Cerros T. & M. I. Miguel V. 254 ♂ (holotype: HUMO!, isotype: UAMIZ!).

Scandent shrubs with pendant shoots, to 2 m long, dioecious. Stems angulate to quadrangulate, becoming cylindrical when mature, glabrous, caulinar roots on mature stems. Leaves alternate to opposite, regularly three pseudoverticillate leaves, petiole 1.4–5.7 mm long; blades ovate to lanceolate, rarely elliptic, 2.8–7.3 × 1.1–2.9 cm, base cuneate to attenuate, margin corky, apex acute, obtuse or rounded, glabrous, venation of three middle veins with lateral branching, resembling pinnate venation. Inflorescences racemose, indeterminate, rarely determinate, present only in mature branches, 1(–2) by foliar axil; male inflorescences 0.7–3.2 cm long, with 13–21 flowers, peduncle 0.4–2.7 mm long; female inflorescences 0.7–1.8 cm long, with 9–20 flowers; peduncle 0.2-1.9 mm long; pedicel and floral bract fused and forming a spathaceous receptacle, 2.2–6.3 × 1.9–3.6 mm, associated to the flowers. Male flowers hexamerous, rarely octamerous, floral buds clavate, apex rounded, mature flowers 6.7–8.5 × 3.8–6.5 mm; calyx 2–4 lobed to irregularly dentate, 1.1–1.5 mm long; petals 5.7–7.5 × 0.9–1.5 mm, unicellular trichomes on the adaxial surface, stamens disposed in two unequal series, the short ones 4.0– 6.1 mm, the long ones 5.1–7.2 mm, filaments adnate to petals, free in the apical portion, surface bullate, anthers 1.7–2.4 × 0.7–1.3 mm, projection of the connective acute to rounded; vestigial ovary 0.8–1.3 × 1.5–2.1 mm, style 4.9–6.1 mm long, tortuous at central and apical portions; female flowers hexamerous, floral buds cylindrical, apex rounded, mature flowers 6.7–7.9 × 4.2–5.7 mm, calyx 2–4 lobed to irregularly dentate, 1.3–1.9 mm long; petals 5.9–7.5 × 0.9–1.2 mm, unicellular trichomes on the adaxial surface; staminodes with sterile anthers, disposed in two unequal series, the short ones 4.3–5.5 mm long, the long ones 5.3–6.8 mm long, filaments entirely adnate to petals, surface bullate; anthers 0.9–1.4 × 0.6–0.8 mm, projection of the connective obtuse to rounded, ovary 0.8–1.5 × 1.5–2.3 mm, style 5.5–6.9 mm long, undulate to tortuous in the superior half, with 2–4 vertical or horizontal folds. Infructescence 1.1–2.1 cm long, receptacle concrescent, 2.4–3.3 × 3.5–4.7 mm. Fruits ellipsoid, 1.6–2.7 × 0.5–0.7 mm.

Distribution and habitat: — Cladocolea spathiflora is known from two regions of the municipality of Coyuca de Catalán and between the municipal boundaries of Eduardo Neri and Leonardo Bravo, in the state of Guerrero ( Fig. 2 View FIGURE 2 ). It is a parasitic plant of oak trees in pine-oak forests, between 1,860 and 2,170 m.a.s.l. It flowers from February to June, the fruits have been reported from March to April. Pollination is carried out by bees.

Ethimology: —The specific epithet refers to the spathaceous resemblance of the receptacle, formed by the fusion of the pedicel and the floral bract.

Comments: —Herbarium specimens of Cladocolea spathiflora may be confused with dried material of C. grahamii (Benth.) Tiegh. or C. pringlei Kuijt , particularly when the inflorescences are immature. However, the new taxon differs of both species in having regularly three pseudoverticillate leaves, a spathaceous receptacle that support each flower instead of sessile flowers on the axis inflorescences, a tuft of hairs in the adaxial surfaces of the petals in female flowers and staminodes with sterile anthers. Additional differences among these taxa are shown in Table 1 and Figure 3 View FIGURE 3 .

Additional specimens examined: — MÉXICO, Guerrero, municipio de Coyuca de Catalán: La Laguna, distr. Mina, 1,860 m.a.s.l., 7 may 1937, G. B. Hinton et al. 10149 ♂ ( ENCB!) ; municipio de Eduardo Neri: 0.7 km al SO de Tres cruces, carretera federal Miraval-Filo de Caballos , 2,171 m.a.s.l., 20 apr 2017, L. G. Galván G., R. Cerros T. & M. I. Miguel V. 255 ♂ ( HUMO!, UAMIZ!) ; 4 km después del Mirabal [El Miraval], carretera Xochipala-Filo de Caballos , 2,130 m.a.s.l., 23 mar 1981, A. R. López F. 37 ♀ ( FCME (× 2)!) ; Chichihualco, en Mirabal [ El Miraval ], 23 km al SW de Xochipala, 2,050 m.a.s.l., 19 apr 1989. J. C. Soto N. & S. Aureoles C. 8258 ♂ ( MEXU!) ; municipio de Leonardo Bravo: aproximadamente 4 km al SW de El Mirabal [ El Miraval ], 2,140 m.a.s.l., 21 feb 1981, F. G. Lorea 1051 ♂ ( FCME (× 2)!) ; a 26 km al W de Xochipala, camino a Filo de Caballos , 2,060 m.a.s.l., 12 jun 1982, E. Martínez S. 749 ♀ ( MEXU!) .

L

Nationaal Herbarium Nederland, Leiden University branch

G

Conservatoire et Jardin botaniques de la Ville de Genève

R

Departamento de Geologia, Universidad de Chile

T

Tavera, Department of Geology and Geophysics

M

Botanische Staatssammlung München

I

"Alexandru Ioan Cuza" University

V

Royal British Columbia Museum - Herbarium

HUMO

Universidad Autónoma del Estado de Morelos

UAMIZ

Universidad Autónoma Metropolitana, Iztapalapa

B

Botanischer Garten und Botanisches Museum Berlin-Dahlem, Zentraleinrichtung der Freien Universitaet

ENCB

Universidad de Autonoma de Baja California

SO

Sofia University

A

Harvard University - Arnold Arboretum

F

Field Museum of Natural History, Botany Department

FCME

Universidad Nacional Autónoma de México, Ciudad Universitaria

J

University of the Witwatersrand

C

University of Copenhagen

N

Nanjing University

S

Department of Botany, Swedish Museum of Natural History

MEXU

Universidad Nacional Autónoma de México

W

Naturhistorisches Museum Wien

E

Royal Botanic Garden Edinburgh

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