DEC., 1913. EUPHORBIACE.E MILLSPAUGH 355 



1. PEDILANTHUS RETUSUS Benth. in Hook. Jour, and Kew Misc., 6:321. 

 1854. 



Shrubby 9 dm.-i.5o m.: leaves glabrous, ovate, 3.8-5 cm. long, 

 2.5 cm. broad, subsessile, oblique, cuneate at the base, retuse, lightly 

 keeled beneath. Cymes terminal and upper axillary, short. Involucres 

 7-8 mm. long: tube glabrous, thrice as long as the appendix; male and 

 female pedicels hairy; appendix lobe entire, truncate, thickened (glandu- 

 lar sic.) slightly below the apex, 4-glandular. Capsule large, rotund; 

 seeds subcarinate on the dorsum. 



Differs from P. tithymaloides in the shape of the leaves, the hairy 

 female pedicel, smaller involucres, and the lip of the appendix being 

 thickened at the apex. 

 Type locality: COLOMBIA, Barra, Rio Negro, Spruce 1469. Type in 



herb. Boissier, Geneva. 

 Distribution: VENEZUELA, Margarita Island, Johnson 59. 



2. PEDILANTHUS TITHYMALOIDES (L.) Poit. An. Mus. Paris, 19:390. 

 1812. 



Tithymaloides myrtifolius Curassavicus Commel. Hort., t. 16. 1706. 

 Euphorbia tithymaloides Linn. Hort. Cliff., 198. 1737: Sp. PL, 453. 



1753- 



Euphorbia myrtifolia Lam. Diet., 2:419. 1786. 



Crepidaria myrtifolia Haw. PI. Succ., 136. 1812. 



Euphorbia carinata Don. Hort. Cantab., Ed. 9:195. 1819. 



Euphorbia canaliculata Lodd. Bot. Cab., t. 727. 1822. 



Pedilanthus canaliculatus Sweet, Hort. Brit., ed. 1:355. 1827. 



Pedilanthus myrtifolius Lk. Hort. Bot. Berol., 2:18. 1833. 



Pedilanthus carinata Raf. Fl. Tell., 4:117. 1836. 



Pedilanthus myrsifolius Raf. loc. cit. 



Shrubby 1.20-1.80 m.; leaves glabrous, subsessile, cuneate at the 

 base, ovate or oblong, 3.5-7.5 cm. long, apex acute often recurved, mar- 

 gin subundulate, the mid-vein often prominently undulate-carinate 

 beneath. Cymes terminal, dense; floral leaves ovate, long-acuminate, 

 slightly longer than the peduncles, early deciduous. Involucres purple, 

 1.1-1.3 mm. long; tube thin, smooth. Appendix 4-glandular, the lobe 

 linear, short. Male pedicels hairy, female glabrous. Style shortly 

 bifid. Capsule 7.5 mm. long, 9 mm. broad, truncate at base and apex, 

 coccas keeled; seeds ovate, 5 mm. long. 

 Type locality: CURACAO. 

 Distribution: VENEZUELA, Lyon; Gollmer. COLOMBIA, Holton; H. H. 



Smith 1295. GUATEMALA, 2072, 6764 John Donnell-Smith; 5011 



