370 FIELD MUSEUM OF NATURAL HISTORY BOTANY, VOL. II 



30. PEDILANTHUS ITZ^EUS Millsp. Field. Col. Mus. Bot., 1:305. 1896. 

 Shrubby, glabrous, 1.5 m. high; branches virgate, strongly zig-zag, 



succulent. Leaves sessile, sarcous, ovate, acute, deltoid at the base, 

 5-7.5 x 46 cm., mid- vein prominent beneath, lateral veins nearly at 

 right angles. Inflorescence terminal, i or 2 involucred; involucres 

 glabrous, light-pink, i cm. x 3.5 mm., superior fissure open three quarters 

 the length of the tube; inferior notch shallow; main lobes rounded; 

 lateral lobes comparatively large, ovate, one third free; fifth lobe ligu- 

 late, free two thirds its length, truncate; all ciliate; male and female 

 pedicels glabrous. Appendix small, about one third the length of the 

 tube, 3-lobed, 4-glandular, lobes deltoid at the base, the central trun- 

 cate, notched, the two lateral triangular, acuminate, shorter. Style 

 3-cleft, the divisions 2-lobed. 



Yaxhalalche. Also cultivated for ornamental purposes and used 

 in domestic medicine. The Mayas consider the plant very poisonous. 

 They use quarter drop doses, in water, as a certain and effectual pur- 

 gative. 

 Type locality: MEXICO, Yucatan, Silam, March to June, Dr. Geo. F. 



Gaunter 452. Type in herb. Field Museum of Natural History, 



Chicago, sheet No. 36.255. 

 Distribution: MEXICO, Yucatan, Merida, Dr. Arthur Schott 552 (in 



herb. Field Museum); Porfirio Valdez 85. CUBA, Britton, Britton & 



Shafer 156. SANTO DOMINGO, Wright, Parry 6 Brummel. 

 Illustration: Field Col. Mus. Bot., i:t.i8. 



CALCEOLASTRUM: Involucre bilabiate, gibbous at the base of 

 the superior lip. Superior lip (appendix) large, anteriorly curved, 

 shoe-shaped, inflated, compressed, orbicular, opening by a small rounded 

 aperture at the base, 4-glandular internally. Lower lip (tube of the 

 involucre) short, urn-shaped; lobes 5, short, somewhat connivent, 

 ciliate; inferior pair ovate, three to four times broader, superior oblong, 

 scarcely shorter. Floral bracts none. Ovary not cup-shaped. Differs 

 from Eupedilanthus in the following characters: shrubs with glandu- 

 liform stipules; upper-lip (appendix) ample and shoe-shaped, the 

 anterior and posterior facies compressed. 



31. PEDILANTHUS FINKII Boiss. in D. C. Prodr., 15:1261. 1866. 

 Shrubby; stems smooth, hollow except at the nodes. Leaves sub- 

 sessile, oblong, 10-14 cm - l n g> the base long-attenuate, apex acute and 

 bearing a dark, cornuous mucron; midrib prominently keeled beneath. 

 Cymes terminal, often twice-dichotomous, branching from the base, 



