362 safford: myrmecophilous acacias 



Type in the herbarium of Captain John Donnell Smith, collected at 

 San Pedro de Sula, Department of Santa Barbara, Honduras, alt. 600 

 feet, March, 1888, by Dr. Carl Thieme (no. 5216); photograph of type in 

 U. S. National Herbarium. 



Section 4. Glomeratae 



Flower heads crowded in clusters in the axils of large forked or horn- 

 like stipular spines. Basal nectar gland solitary, much elongate, sunk 

 in the grooved rachis. 



11. Acacia Cookii Safford, Science, N. S. 31:677. 1910. 



Type in the U. S. National Herbarium, collected at the Finca Trece 

 Aguas, near Secanquim, Alta Verapaz, Guatemala, March 8, 1907, by 

 G. P. Goll (no. 102), supplemented by specimens in alcohol from the same 

 region, collected by O. F. Cook. 



12. Acacia bucerophoraB. L. Robinson, Proc. Am. Acad. 49: 502. 1913. 

 Type in the Gray Herbarium, collected in British Honduras, in 1907, 



by Prof. Morton E. Peck (no. 632). Photograph and fragments of the 

 type are in the U. S. National Herbarium. 



GROUP III. LEGUMINIFERAE 



(Spicatae Schenck) 



Pericarp dehiscent along both the ventral and the dorsal sutures, 

 coriaceous or woody, relatively short; seeds embedded in a mass of pulp- 

 like aril. Flowers crowded in long spikes on a linear axis, this thicker 

 than the peduncle. Extrafloral nectar glands beadlike, with a round 

 central pore, often present on the rachises of the terminal pinnae as well 

 as upon the petiole of the leaf, but not at the base of each pair of pinnae. 



Section 5. Orthocarpae 



Pods straight, abruptly pointed or obtuse, tumid or subterete; seeds 

 alternate in 2 rows. Spines usually slender, straight or curved, slightly 

 broadened and compressed at the base. 



13. Acacia yucatanensis Schenck, Repert. Nov. Sp. Fedde 12:361. 

 1913.— Bot. Jahrb. Engler 50:468. 1914. 



Type in the Berlin Herbarium, collected in the forest near Chichen 

 Itza, Yucatan, in May, 1911, by Caec. and Ed. Seler (no. 5549 [470]). 



14. Acacia Collinsii Safford, Science, N. S. 31:677. 1910. 



Type in U. S. National Herbarium, no. 692159, collected between 

 Chicoasea and San Femandino, State of Chiapas, southern Mexico, 

 January 14, 1907, by G. N. Collins (no. 180). 



Section 6. Acinaceae 



Pods scimitar-shaped, or straight along the dorsal and curved along 

 the ventral suture, the apex more or less retrocurved, usually compressed 



