354 FIELD MUSEUM or NATURAL HISTORY BOTANY, VOL. II 



KEY 



INVOLUCRE SHOE-SHAPED. Appendix smaller than the tube. 

 Lobe of the appendix entire: 



Tube glabrous without and within: 



Male and female pedicels hairy I retusus 



Male pedicels hairy, female glabrous: 



Appendix one third the length of the tube: 



Lobe hairy-margined 2 tithymaloides 



Lobe not hairy-margined 3 Deamii 



Appendix one half the length of the tube 4 jamaicensis 



Male and female pedicels glabrous: 



Leaves glabrous 5 parasiticus 



Leaves pubescent: 



Bracts minute, cuculliform, style 6-toothed 6 Pringlei 



Bracts large, foliacepus; style 3-lobed 7 Smallii 



Tube glabrous without, hairy within 8 padifolius 



Tube pubescent without, glabrous within: 



Bractlets longer than the peduncles 9 angustifolius 



Bractlets half the length of the peduncles, or less: 



Male and female pedicels puberulent throughout 10 bahamensis 



Male and female pedicels puberulent above 1 1 Fendleri 



Male pedicels glabrous, female pubescent at base 12 Grisebachii 



Lobe of the appendix bipartite: 



Colored floral bracts conspicuous: exceeding the inflorescence: 

 Involucral tube glabrous: 



Glands of the appendix 2 13 articulatus 



Glands of the appendix 4 14 bracteatus 



Involucral tube puberulent: 



Capsule cornuate 15 spectabilis 



Capsule not cornuate: 



Male and female pedicels glabrous: 



Lobes of the appendix laterally compressed: 



Lobes glabrous 16 Greggii 



Lobes puberulent 17 Olsson-Sefferi 



Lateral and fifth lobes of the tube flabellate 18 involucratus 



Lateral and fifth lobes of the tube linear 19 rubescens 



Male pedicels glabrous, female pubescent: 



Filaments and anthers glabrous 20 Palmeri 



Filaments and anthers pubescent 21 tomentellus 



Involucral tube hairy 22 Pavonis 



Colored floral bracts not exceeding the inflorescence: 



Bracts the length of the peduncles 23 macradenius 



Colored floral bracts wanting: 



Peduncle posteriorly affixed to the tube: 



Appendix projected along the margin of the fissure: 



Peduncles glabrous 24 (Erstedi 



Peduncles puberulous 25 aphyllus 



Appendix not projected along the margin of the fissure: 



Tube glabrous within 26 nodiflorus 



Tube hairy within 27 cymbiferus 



Peduncle centrally affixed to the tube 28 macrocarpus 



Lobe of the appendix tripartite: 



Two of the divisions superior, one inferior 29 peritropoides 



All three divisions on one plane 30 Itzaeus 



INVOLUCRE HOOD-SHAPED. Appendix larger than the tube 31 Finkii 



