GENTIANER, _ 353 
12. Halenia rothrockii, A. Gr. in Proc. Am. Acad. xi. p. 84; Rothr. in 
Wheeler’s Rep. t. 21. 
Nortu Mexico, Mount Graham, within the old boundary (Rothrock). 
13. Halenia schiedeana, Griseb. Gentian. p. 327; DC. Prodr. ix. p. 130. 
Swertia michauxiana, Cham. et Schi. in Linnea, v. p. 122. 
Mexico (Schiede). 
12. LIMNANTHEMUM. 
Limnanthemum, 8. P. Gmel. in Nov. Act. Petrop. xiv. (1769) p. 527, t.17. fig. 2, ex C. C. Gmel. ; 
‘Benth. et Hook. Gen. Plant. ii. p. 819. 
Aquatic herbs, very widely dispersed in tropical and temperate regions. Twenty-four 
species have been described ; ‘but there are probably not more than half that number 
of good species. 
1. Limnanthemum humboldtianum, Griseb. Gentian. p. 347; DC. Prodr. ix. 
p. 140. 
Villarsia humboldtiana, H. B. K. Nov. Gen. et Sp. iii. p. 187. 
Menyanthes indica, Aubl. Pl. Guian. i. p.118; Descourt. Fl. Antill. i. p. 112, t. 24. 
Generally dispersed in the West Inpizs and Tropicat America, including Mexico 
and CenTRAL AmERIcA. Hb. Kew. 
Order XCI. POLEMONIACE/., 
Polemoniacee, Benth. et Hook. Gen. Plant. ii. p. 820. 
Herbaceous, or rarely shrubby. Eight genera, comprising about 150 species, whereof 
a few inhabit temperate Europe and Asia, and the rest America, chiefly the north-west, 
and the Andes. 
1. PHLOX. 
Phiox, Linn. Gen. Plant. n. 214; Benth. et Hook. Gen. Plant. ii. p. 821; A. Gr. Synop. Fl. N. Am. 
ii, p. 129. 
Twenty-seven herbaceous species, with two or three exceptions in North-eastern Asia, 
confined to North America. Several of them are common in Southern Texas, New 
Mexico, and Arizona, and may be expected to extend into North Mexico. Not one 
species, we believe, has been found within the present boundary of Mexico. 
1. Phlox longifolia, Nutt., var. stansburyl, A. Gr. Synop. Fl. N. Am. ii. p. 133. 
Phlox speciosa, var.? stansburyi, Torr. Bot. U.S. & Mex. Bound. Surv. p. 145. 
British CotuMBia southward.—Nortu Mexico, Sierra San Luis (Smith). 
BIOL. CENTR.-AMER., Bot. Vol. IT., February 1882. 22 
