BOTANICAL GAZETTE. 271 
lythrum Hook. fil. “Rotala ramosior bears all the characters of the 
genus, and it is only its habit that has misled botanists into bring- 
ing it under Ammannia and, in general, to unite the whole genus 
with the latter, 
- DENTIFERA Koehne, no. 12 of Monograph, l. ¢. vol. 1. p. 
161. (Ammannia dentifera A. Gray, 1853.) I have not seen this 
species, which has been found only near Santa Cruz, in the Mex- 
lean State of Sonora, but will probably be met with in the ad- 
Joining parts of the United States. 
It may be added that the small &. Mexicana Cham. et Schl., 
. species: widely spread from Mexico to the West Indies and 
Brazil, from Japan to Australia, and from the East Indies to 
Madagascar and West Africa, may possibly occur also in South- 
etn Texas or in Florida. 
II. Ammannta L, sens. restr. 
Petals 4: stamens exserted. 
Capsule half exserted: peduncle 2mm. long: cymes 
: rather loose: stamens 4, rarely 3. 
Capsule totally included: cymes subsessile, dense : : 
stamens 4- 3. A. coccwned. 
Petals 0: stamens 4, included : stigma subsessile. 4, A. latifolia. 
2. A. aurIcuLATA Willd. 1806 (2): no. 32 of Koehn. Mon. 
l. i. p. 244. (4. arenaria HBK. 1823: A. Senegalensis 
. e Lam.: A undulata C. A. Meyer, 
ia A. pusilla Sonder. 1848; ?A. sagittata var. angustifolia A. 
l - 1845: A. Wrightii A. Gray, 1853: 2A. longipes Sauvalle, 
868.) IT have scen no North American specimens except from 
it Orleans. The species extends from the Rio Grande del 
i i Ecuador and Brazil, from the Cape to Senegambia and 
thos, and along the Nile to its mouth, from the er re 
80 a Eastern India to Southern China and Australia. 1t has 
metimes been confounded with A coccinea. 
2, A. auriculata. 
