C. H. TV LEE, TOWNSEND — BIOGEOGRAPHY OE MEXICO, ETC. 81 
Leaves very small and inconspicuous at time of flowering. Lower Eio 
Grande. (14) 
15. Koeberlinia spinosa Zucc. — Noticed in bottoms from Brownsville 
to Fort Ringgold. Extends from Brownsville to EL Paso and the Me- 
silla Valley of the Rio Grande, through western Texas and into south- 
ern New Mexico. (74). 
16. Sesbania cavanillesii Watson. — June, blooming through the month. 
“Seney-weed,” and “coffee-bean.” Identified (without pods) by Coulter 
with a query as vesicaria Ell., but I am quite sure it is this species. Per- 
ennial shrub, not an annual. Lower Rio Grande to San Antonio. (77) 
17. Erythrina herbacea Linn. — June 7, beginning to bloom. Forming 
thickets in places near San Tomas. Florida to North Carolina and Mis- 
sissippi. (47) 
18. Rhynchosia menispermoidea DC. — June 23. Eastern and southern 
Texas. The present record extends the range of this species southward; 
it was previously known to extend only as far as Corpus Christi. (81) 
19. Hojfmanseggia caudata Gray. — March 29. Shrub or small tree, 
with beautiful bunches of clear deep yellow locust-like flowers. Native 
and cultivated. From the Nueces to the Rio Grande. (23) 
20. Parkinsonia aculeata Linn. — May 2, in height of bloom. “Reta- 
mal.” Native and cultivated. Southern and western Texas. (36) 
21. Mimosa strigillosa T. & G. — May. A creeping species. Gulf 
States, through low coast lands of Texas into Tamaulipas and down the 
Mexican coast. Det. Coville. (37) 
22. Mimosa berlandieri Gray? — June 28. Lower Rio Grande region, 
towards the coast. (83) 
23. Mimosa sp. — March 6 to 24. Flowers deep buff-yellow. (2) 
24. Leucaena pulverulenta Benth. — June 7. Tree growing in edge of 
palmetto hammocks at San Tomas. Southern Texas and the Lower Rio 
Grande Valley. (70) 
25. Pithecolobium flexicaule (Benth.) Coult. — June 15, in bloom; and 
again August 12. “Ebony.” Rio Grande Valley, and northern Mex- 
ico. (50) 
26. Rosa nutkana Presl. — June 28. In immense thorny masses, rank- 
ly-growing, with very large main stems. Apparently not before recorded 
from Texas. (86) 
27. Oenothera speciosa Nutt. — March 12 to 31. From Indian Terri- 
tory to the lower Rio Grande and West Texas. (4) 
28. Gaura sinuata Nutt. — April 29. Throughout Texas. (32) 
29. Mamillaria sp.? — May 12. Fort Ringgold, Texas.' Skin smooth, 
green with a whitish bloom; whole plant measuring six inches, and con- 
ical in form. Green crown, or portion above ground, hardly one inch 
high, two and one-fourth inches in diameter. Tubercles with tuft of 
