NOTES

A NEW COMBINATION IN ZANTHOXYLUM (RUTACEAE)

The following new combinationresults from a study of the family Rutaceae for the Flora of Panama. A photographis included (Fig. 1, p. 262), as this has never been illustrated. Zanthoxylum tripetalum (Standley) D. M. Porter,comb. nov. BASIONYM: Amyris tripetala Standley, Field Mus. Nat. Hist. Publ., Bot. Ser. 22: 84. 1940. [ PANAMA. CHIRIQUI:"Boquete. 3800 ft. , 10-20 ft. Flower creamy-white."12 May 1938. M. E. Davidson 621 (F, holotype; GH, MO, US, isotvpes)] Examinationof the above-cited type material, plus a more recent collection [PANAMA. CHIRIQUI:"Denuded premontane rain forest between Pinola and Que- brada Seco on the Chiriquicito-CalderaTrail. Tree 20 cm diameter; apparently armed with conical corky spines, or unarmed."21 April 1968. Kirkbride& Duke 1024 (MO)], shows this taxon to fall within the generic limits of Zanthoxylum. Following his type description,Standley indicated that, "In its trimerousflowers the tree is perhaps anomylous in the Amyris, to which it seems best re- ferred."-Duncan M. Porter,Missouri Botanical Garden.

TWO NEW SPECIES OF () FROM CENTRAL AMERICA

Protium is the largest New World genus of the Burseraceae, with probably more than 100 species. By far the largest number of species occur in the vast Amazon basin of South America. Perhaps 15 or 20 species are to be found in Mexico and Central America. The latter appear to form a group of closely-related species, with only Protium tenufoliumnsubsp. mcleodii (Johnston) Porter and P. tenuifolium subsp. sessiliflorum (Rose) Porter having definite affinities with South American taxa. The two new species from Costa Rica and Panama de- scribed below both fall into this pattern, their affinities being with other Middle American species. Both are named for their respective collectors. Unfortunately, each is known only from a single collection.

Protium correae D. M. Porter, sp. nov. Protio tenuifolio subsp. mcleodio (Johnston) Porter primo adspectu maxime simile, sed floribus tetrameris rufis-tomentosis et pedicellatis. Tree, the branchlets reddish-tomentose and minutely puberulent, soon glabrate and somewhat glaucous. Leaves alternate, odd-pinnate, 7.5-13.5 cm long; petioles canaliculate, 1.5-3 cm long, they and the petiolules swollen apically and basally, 262 ANNALS OF THE MISSOURI BOTANICAL GARDEN [VOL. 58

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FIGUIRE1. Isotype (US) of Zantroxylum tripetalum (Standley) D. M. Porter.

they, the petiolules, and the rachises minutely puberulent and somewhat reddish- tomentose, becoming glabrate; leaflets 3-5, elliptic to slightly ovate or obovate, abruptly acumninateapically, cuneate and slightly inequilateral basally, subcori- aceous, the margins entire, reddish-tomentose and minutely puberulent, especially 1971] NOTES 263 on the veins, the blades of the laterals 3.7-6.5 cm long and 1.7-3.4 cm wide, the blades of the terminals 5-8.5 cm long and 2-4.5 cm wide. Carpellate inflorescences axillary, panticulate, few-branched from the base, reddish-tomentose and minutely puberulent throughout, to 5 cm long. Carpellate flowers beige, 4-merous; pedi- cels reddish-tomentose and minutely puberulent, 1-2 mm long; calyx cupuli- form, 1.5 mm high, reddish-tomentose, fleshy, 4-lobed, the lobes broadly tri- angular, shorter than the tube; petals 4, lanceolate, recurved and inflexed-apiculate apically, reddish-tomentose on both surfaces, fleshy, ca. 3 mm long and 1 mm wide; stamens 8, inserted at the base of the disc, 1.5 mm high, the filaments subulate, widened basally, the anthers less than 1 mm in diameter, sterile; disc fleshy, thick, glabrous, surrounding the base of the ovary; ovary ovoid, reddish- tomentose, tapering into the style, ca. 1 mm high, the style reddish-tomentose I basally, glabrous apically, the stigma 4-lobed. unknown.

Type. PANAMA. PANAMA: "Beyond Cerro Jefe near La Eneida. New road just before La Eneida, along new trail which begins exactly beside Lopez House. Large tree on ground. Flowers beige." 20 February 1968. Mireya D. Correa A. 723 (MO, holotype).-Fig. 1. This species superficially resembles Protium tenuifolium subsp. mcleodii, which is endemic to Panama and known from the islands of the Archipielago de las Perlas and from one locality in Darien province. The latter differs, however, in having minutely puberulent branchlets, leaves, and inflorescences; leaves 17.5- 38.5 cm long; leaflets 7-11; flowers 5-merous and sessile or subsessile; calyx minutely puberulent; petals glabrous and not reflexed; disc tomentulose; and ovary tomentulose. Despite the superficial resemblance, the two do not appear to be closely related. In my key to Protium for the Flora of Panama (Ann. Missouri Bot. Gard. 57: 11. 1970 [1971].), specimens of P. correae would be determined as P. costaric- ense, a species known from the Canal Zone and the Costa Rican provinces of Alajuela and Puntarenas. Protium costaricense differs from P. correae in having brownish-hirtellous branchlets, leaves, and inflorescences; leaves 13-44 cm long; leaflets (3-) 5-7 (-9); flowers sparsely puberulent; and ovary pubescent. The two obviously are closely related.

Protium ravenii D. M. Porter, sp. nov. Differt a Protio panamensi (Rose) Johnston foliis adpressis-puberulis, in- florescentiis frugiferis adpressis-puberulis et 15-19.5 cm longis, fructibus ad- pressis-puberulis et longis-stipitatis. Tree, 50 feet high, the branchlets brownish, dotted with paler brown lenticels, appressed-puberulent, becoming glabrate. Leaves alternate, odd-pinnate, to 30 cm long and 26 cm wide; petioles canaliculate, 5-6.5 cm long, they and the petiolules swollen apically and basally, they, the petiolules and the rachises dotted with pale brown lenticels and appressed-puberulent, becoming glabrate; leaflets 3-5, ovate to elliptic or obovate, abruptly acuminate apically, cuneate and inequalataral basally, coriaceous, the margins entire, sparsely appressed- puberulent, more so on the midveins, the blades 12.5-25.5 cm long and 5-8.5 cm