368 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. II 



length of the tube; main lobes truncate, erose-dentate, overlapping to 

 form an oval orifice of the sinus; lateral and fifth lobes ligulate, free at 

 the apex, equal, truncate, the lateral connivent with the edges of the 

 fissure; the fifth lobe keeled, all saccate at the base; male and female 

 pedicels glabrous; young capsule hairy. Appendix nearly as long as 

 the tube, 2-saccate and 2-glandular at the base, deeply bi-lobed, the 

 lobes narrowly ligulate, unequally 2 -digitate, appearing like an extended 

 and apposed thumb and forefinger of a human hand. 

 Type locality: MEXICO, Yucatan, Silam, abundant about the port, 



April, 1895, Dr. George F. Gaumer 649. Type in herb. Field Museum 



Natural History, Chicago; sheet No. 36.452. 

 Distribution: MEXICO, Yucatan, Progreso, Mills paugh 1667. 

 Illustration: Field. Col. Mus. Bot., i:pl.iy. 



27. PEDILANTHUS CYMBIFERUS Schlecht. in Linnasa, 19:253. 1847. 

 Branches crispid-hairy; leafless. Cymes . . .; peduncles glabrous, 



8 mm. long; involucres glabrous, 1.2 cm. long; tube with the inferior 

 notch 4 mm. deep; main lobes equal, rounded and finely serrate at the 

 apex; lateral lobes connate to near the obtuse, serrate apices, pubescent 

 without; fifth lobe spatulate; male and female pedicels glabrous; ovary 

 glabrous; style 6 mm. long, shortly 3-cleft at the apex. Appendix sar- 

 cous the gibbous portion warty-tuberculate without and closely puberu- 

 lent within including the lip; lobes ligulate, 6 mm. long, obtuse; glands 

 unknown. 

 Type locality: MEXICO, Liebold 213. Type in herb. University of 



Kiel, Germany. 

 Distribution: Known only from the type. 



28. PEDILANTHUS MACROCARPUS Benth. Bot. Voy. Sulph., 4^.23, f. A. 

 1844. 



Hexadenia macrocarpa Kl. & Gke. Tricocc., 107. 1859. 



Shrubby, 9 dm. high; dichotomously branching; branches terminal, 

 thick, fleshy, articulated by constriction. Leaves of the stem unknown. 

 Cymes lax, few-flowered; floral leaves or bracts minute, 6-8 mm., cucul- 

 late, one quarter the length of the peduncle; peduncles shorter than the 

 involucres; involucres 1.8-3.2 cm. long (2.3 x i cm.) the peduncle central 

 on the tube; tube plainly gibbous, 4-lobed (sic.) the superior fissure closed 

 to the throat, the inferior notch shallow; main lobes orbicular and erose- 

 dentate at the apex; lateral and fifth lobes narrowly linear and connate into 

 a trefoil at their apices where only they are free, apices flabellate, ciliate ; 

 male flowers ligulo-bracteolate, the pedicels with that of the female flower 

 glabrous; styles bi-lobed at the apex; capsule large, fleshy, 2.4 cm. 



