NOTES ON BROMELIACEAE, XXXI Lyman B. Smith KEY TO TILLANDSIA AND SIMULATORS The present revision aims to record all the changes that have taken place in TllJandsia since Mez's monograph in the Pflanzen-reich in 1935 sls well as a number that he missed because his work was in press. This will serve to prepare the ground for the second volume of ray monograph in the Flora Neotropica, namely the subfamily Tillandsioideae. Everyone will have a chance to criti-cize and ray final draft will be that rauch better. In this key I have included a number of vrieseas that have been mistaken for Tillandsia or that easily might be and also some guzmanias with siraple inflorescences for the same reason. Although the key is frankly artificial and the species are listed alphabetically afterward, I have placed an estimate of its subgenus after each one-I am using the same subgenera as Mez, except that I have reduced Fityrophyl lum to subgenus Tillandsia (Platystachys in Mez) and Aerobia to Anoplophytum . 1. Sepals asymmetric, free, oblong or broadest near apex, rarely over 10 mm long; flowers distichous, sometimes becoming secund Sub key XII ( Tillandsia subgenus Pseudo-Catopsls ) 1. Sepals symmetric, or if slightly asymmetric, then ovate or lanceolate, broadest near base. 2. Leaf -blades narrowly triangular and tapering evenly from base to apex or linear and not over 2 mm wide. 3. Flowers polystichous (more than 2-ranked); inflorescence simple Subkey VIII 3. Flowers distichous (2-ranked) or solitary, sometimes turning secund at anthesis. 4. Plants caulescent; stems evenly leafy, not rhizomatose; leaves not rosulate nor fasciculate; flowering shoot short or of medium height; inflorescence not raore than bipinnate Subkey I h. Plant steraless, but soraetiraes bearing rhizomes; leaves rosulate or fasciculate. 5. Lower primary bracts (exclusive of blades) equaling or exceeding the axillary branches Subkey VII 5. Lower primary bracts shorter than the axillary branches or the inflorescence simple. 6. Leaf-sheaths convergent at their apices, inflated and forming a pseudo-bulb, nearly concolorous with the blades to somewhat ferruginous Subkey VI 6. Leaf -sheaths divergent and not forming a pseudo-bulb even if somewhat inflated (some species with sheaths subin-flated but dark castaneous or purple). 7-Floral bracts broad, densely imbricate and covering the rhachis at anthesis or flowers solitary Subkey II 121
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