154 Plante Lindheimeriane. 
4—5 lines in diameter, purple. Capsule about one line long, 
almost globose. Seeds smoother than in any other of our 
species.’ 
1 “ Besides these two species, we have in the flora of the United States, three others 
very different from these, but nearly related to one another; namely, the well-known 
T. teretifolium, Pursh, T. calycinum, Engelm. in Wisliz. Rep.; and 7’. parviflorum, 
Nutt.; all three now in cultivation with me, and well distinguisbed from one another. 
T'. calycinum is very ornamental; the large flowers have sometimes six to ten petals. 
“ Mr. Lindheimer has discovered two undescribed species of Portulaca in Western 
Texas. As these plants are so difficult to preserve and so unsightly when dried, he 
did not collect specimens for distribution; but from his seeds both were raised by me 
last season and prove very remarkable plants, one from its near alliance with Portu- 
laca oleracea, the other from its great difference from that species. I arrange the 
species of our flora (all of them annuals) in the following manner. 
PORTULACA. 
* Spathulate: glaberrimee; caule tereti; foliis spathulatis obovatis ; sepalis alato- 
carinatis cum operculo capsule maturee deciduis ; petalis flavis emarginatis s. bilobis; 
capsule annulo circulari tumido. J 
1. P. overacea, L.: foliis obovatis spathulatis apice rotundatis; alabastro com- 
presso oyato acuto; sepalis carinatis; staminibus 7-9; stigmatibus 5 stylum bre- 
vem superantibus; seminibus minoribus minute sub lente verruculosif nigris. — St. 
Louis, very common; flowers open in direct sunshine between 9 and 10 o’clock, 
A.M. August. 
2. P. retusa (n. sp.) : foliis cuneatis retusis, seu emarginatis ; alabastro compresso 
orbiculato obtuso; sepalis late carinato-alatis; staminibus sub-15 (17 - 19, Lindh., 
in plantis parvulis 7-10); stigmatibus 3-4 stylum eequantibus vel eo brevioribus; 
seminibus majoribus sub lente echinato-tuberculatis nigricantibus. — Granite region 
of the Liano in Western Texas. Flowers open in direct sunshine between 83 and 93 
A. M. (in St. Louis, in August), always before the common species. — Distinguished 
from the nearly allied P. oleracea by the broader retuse leaves, and broader calyx; 
by the larger, more distinctly tuberculated, somewhat paler seeds, much larger 
style, and shorter and fewer stigmata. Number of stamina variable. In large speci- 
mens (bushes several feet in diameter, stems at base 6-7 lines thick, prostrate or 
ascending); the number counted was 15. Stigmata almost invariably 4, rarely 3. 
* * Lanceolate: glaberrime ; caule angulato; foliis superioribus lanceolatis ; sepa- 
lis vix carinatis post anthesin deciduis ; petalis plerumque versicoloribus acutiusculis ; 
capsule ala circulari lata ex calycis basi aucta. 
3. P. Lanceo“aTa (n. sp.): sub-erecta; foliis inferioribusspathulatis obtusis, superi- 
oribus lanceolatis acutis; petalis obovatis s. oblanceolatis acutiusculis s. cuspidatis ; 
staminibus 7-27; stigmatibus 3-6; capsula turbinata versus apicem ala circulari 
lata cincta ; seminibus majoribus echinato-tuberculatis cinereis. 
a. VERSICOLOR ; petalis majoribus obovatis rubris basi flavis; staminibus 12-24; 
stigmatibus 5-6 linearibus; capsule ala orbiculari plana. 
8. MiNoR; petalis minoribus oblanceolatis seepe totis flavidis rarius apice rubellis; 
staminibus 7-12; stigmatibus 3-4 ovato-oblongis; capsule ala subpentagona un- 
dulata. 
Granite region of the Liano, in Western Texas. — Stems in smaller plants a few 
inches high, erect, with erect branches; in larger specimens a foot or more high, as- 
