270 BOTAKY OP THE VOYAGE OF H.M.S. HERALD. 
be seen that they fonn, especiaUy as regards their leaves, a transition between those found in Herbaria 
under the names of P. Ugusiroidcs, St. Hil., and P. olecefoUa, St. Hil, all three being slight varieties of one 
well-defined species, remarkable for its thick, almost coriaceous, and reticulated foliage. 
Geographical distribution: Zonaguia, Mex. (Hartweg, no. 447!), Sierra de San Pedro Kolasco, Talea^ 
etc Hex (Jurgensen, nos. 412, 541, and 453!), Pueblo Nuevo, Chiapas (Linden, no. 172 !), Guatemala 
(H^rtweg, no. 572! Skinner!), Minaa Gera^s (Claussen! Gardner, no. 4425 !), ViUa do Principe (Gardner, 
no. 4424!), some other part of Brazil, not specified in Herb. Hook. (Langsdorf!). 
23. PoLYGALA (§ Senega) Americana, Mill. Diet. n. 7.^P. riviniaifoUa, H.B.K., Nov. Gen. 
vol. V. p. 408 !— P. Caracasana, H.B.K. 1. c. p. 407 !— P. ovalifoUa, De Cand. Prodr. vol. i. p. 331 ! 
—P. obscura, Benth. PL Hartw. p. 58!— P. platycarpa, Benth. 1. e. p. 113!— P. hebantha, Benth. 
Bot. Sulph. p. 67 !— P. ovatifolia, A. Gray, PI. Wright, p. 39 !— P. puberula, A. Gray, 1. c. p. 40 !— 
P. grandiflora, AValt. Car. p. \7<d\—F. pubescens, Miihl. Cat. p. 66!— P. Senega, var. rosea, Michx. 
Fl. vol. ii. p. 53 !— P. Senega, A. St. Hil. et Moq. Tand. in Mem. Mas. vol. xvii. t. 27 et 28. f. 10 ! 
non Linn. Chihuahua (Potts !), Acapulco (Sinclair !). 
A plant extremely variable in the size and form of its foUage ; in the humid, hot coast-region the leaves 
are broad ovate or elliptical, but in the dry, cool districts of the Mexican table-land, etc. (Oaxaea, Chihua- 
hua, for instance), very narrow, often Imear. P. Americana is a half-shrubby plant, always more or less 
clothed with down, alternate, mucronate leaves, racemose bluish flowers, and emarginate capsules. 
Geographical distribution: Mexico (Galeotti, no, 883! Hartweg, no. 446! Coulter, no. 732 ! Bates! 
Linden, no. 174 ! W. Harris !), Guatemala (Skinner ! Hartweg, no. 632 !), Gulf of Ponseca (Sinclair !), Yol- 
cuno of Chiriqui, Veraguas (Seemann, no. 1645!), Cerrito de Guayaquil, Ecuador (Jameson!), Island of Tri- 
nidad (Lockliart!), New Mexico (C. Wright, no. 103 !). 
24. MoNNiNA (§ Hebeandra) Xalapensis, Kunth, De Cand. 1. e. p. 339. Sierra Madre. 
CARYOPHYLLE^. 
r 
25. MoLLUGO arenarla, H.B.K., De Cand. Prodr. vol. i. p. 393. Tepic (Lay!). 
26. Drymabia cordata, Willd., De Cand. Prodr. vol. i. p. 395. Talisco (Lay and CoUie !) . 
27. Stellaria nemorum, Linn., De Cand. Prodr. vol. i. p. 396. Sierra Madre. 
I cannot find any difference whatsoever between the specimens collected by me in the temperate parts 
of the Sierra Madre and the common European type of S. nemorum, Linn. That the seed of it may have 
been imported is a thought which would strike every one on first hearing of this plant as growing in Mexico, 
but the place where I found it does not at all favour such an hypothesis, and I am therefore inclined to look 
upon it as indigenous. I may also remark that Bridges found it at Valparaiso, Chile ; it is his no. 121. 
POBTULACEiE. 
28. V ORTV LAC A pUosa, Smith? Hook, et Am. Bot. Beech, p. 293. Tepic (Lay!) 
4 
29. PoRTULACA sp. {olcracea, Linn. ?) — Nomen vemacul. " Verdolaga." Common about Ma^ 
zatlan, where it is used as a potherb. 
MALVACE^. 
30. Malva spicata, Linn., De Cand. Prodr. vol. i. p. 430. Tepic (Lay !) 
