ANNALS OF THE MISSOURI BOTANICAL GARDENupper 2 or 3 staminate. Glumes 10-13, membranous, 1-nerved, whitish, glabrous;the basal 3 or 4 empty, broadly lanceolate, 2.1-6.0 mm long, acute, apex with ashort mucro ca. 0.5 mm long; upper glumes mostly 6.0-6.5 mm long, broadlyacute. Stamens 3, anthers 3-4 mm long; style branches 2, ca. Vio the length ofthe undivided portion. Achenes biconvex, lenticular, grayish-brown, 2.5-2.7mm long, 2.3-2.6 mm wide, 1.5-1.8 mm thick; achene body nearly orbicular insurface view with a rim around the entire circumference; surface of achene finelyreticulate; style base elongate triangular, 2.0-2.4 mm long and 1.2-1.4 mm wideat its base, slightly narrower at its base than the apex of the achene, indistinctlyreticulate, grayish-white. Hypogymous bristles 5 or 6, slightly shorter thanachene and style base. The following Panamanian collections have been examined (ail iMO): PANAMA: Cerro Campana, Croat 22794, 17160. Along road into Santa Rita, Kennedy2745. Road to Carti from Panamerican Highway near El Uano, Kennedy, Dressler & Mahler2413. 3 mi. NE of Altos de Pacora, Liesner 513. COLON: Ca. 2-3 mi. up Rio Guarche,Kennedy & Foster 2148. Santa Rita Ridge, 1 mi. from Boyd-Roosevelt Highway, Croat 15320.CANAL ZONE: Quebrada Lopez, Allen 2129. The rhizome system is striking in well-developed plants reminding one, ona smaller scale, of the pachymorph rhizomes of many bamboos.-Gerrit Davidse,Missouri Botanical Garden. ANATOMIC CONSIDERATIONS OF THE CALYX OF ADENOCALYMMA COMOSUM (CHAM.) A.P. DC. This investigation was motivated by the occurrence of patelliform glandson the calyx of the specics of Adenocalymhna Mart. ex Meisn. According toR. J. Siebert (Ann. Missouri Bot. Gard. 35: 123-136. 1948), the presence ofglands in the Bignoniaceae is a characteristic of great value for the separationof taxa within the family. For a better understanding (and possibly for futuretaxonomic use), I decided to study the structure of these glands, and also theanatomy of the calyx. Adenocalymnma comosum (Cham.) A.P. DC. was chosenfor two reasons: it is the type species of the genus and material is easily obtainedin the State of Guanabara, Brazil. The material used for this study corresponds to herbarium sheet D. Sucre6600 in the Rio de Janeiro Botanical Garden Herbarium (RB), collected in theSerra do Mendanha, State of Guanabara. Fresh material was used for microchemical tests. Structural observationswere made on fresh material fixed in FPA. This material was submitted to theusual dehydration methods and paraffin impregnation. Blocking and cuttingwith a rotating microtome (thickness of 14 p) followed the Jung method. Thematerial was stained with safranin-fast green and mounted in Canada balsam.The presence of sugar was confirmed by Fehling's solution (D. A. Johansen,Plant Microtechnique, New York & London, 1940). Using a binocular Zeissmicroscope, the most important details were recorded in microphotography.530[VOL. 61
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