26 



PLANT^ WEIGHTIAN^ 



V 



W. Texas; June. — This truly perennial species 



ly related to L. Boottii 



Planch., which includes all that has been called L. rigidum from JSTew England 



North Carolina, and Georg 



I have 



from Illinois. The distinctions of 



Locality not record 



these species are indicated by Dr. Engelmann, in the subjoined 

 72. L. ARisTATUM, Engelm. in Wisliz. Mem. N. Mex. p. 101. 

 ed ; probably from the valley of the Rio Grande, near El Paso, where it was detect 

 ed by Dr. Wislizenus. 



t JnX.rvi*i^ 



(^l'- 



i 



Sf^-*-^ 



^ 



^* 



zos, N. Braunfels, and the Pierdenales, Lindhemer, ^c. On the San Pedro River, WrigJiL — The latter 

 approaches a slightly glaucous form, with narrower and more rigid leaves, which occurs on the Cimarron 

 (^lVislizenus j Fendler^ mixed with No, 85), often only two or three inches high, but much branched, with 

 manifest stipular glands ; the capsule ovate and acute. It appears very near to L. [rigidum, var.] puberu- 

 lum ; but the structure of the false dissepiments is decisive, 



§ 2- Capsules 10-vaIved. 



* Styles united at the base or below the middle. 



6. L. Bo OTTii y Planchon. Annual; styles in northern (St. Louis) specimens united at or below the 

 lower third only, in Texan specimens (/3. Planchon) almost to the middle; capsulcs globose, acute, 10- 

 valved ; the secondary dissepiments incomplete, with numerous hair-like fibres on thc margin. — No. 86, 

 PL FendL belongs here, and not to L. rigidum. This is the only one of our species with a 10-valved cap- 

 sule, where the styles are somewhat united, 



** Stylesfree to the base. 

 t Secondary dissepiments incomplete. 



7. L- KUPESTRE, Engehn. in PL Lindh, 2. p. 232. Capsule globose-ovate, acute or cuspidate, 

 like that of the foregoing species, but snialler ; secondary dissepiments exactly the same : distinguished 

 principally by the perennial ligneous root, the subulate leaves, the smaller flowcrs and fruit, and the entire- 

 ly free styles. — Found by Lindheimer about New Braunfels, and Camanche Spring ; by Wright (No. 71) 

 on Turkey Creek. Dr. Gregg collected it near Saltillo in June, and a variety, which may be namcd /3. 

 cymulosumj on the battle-field of Buena Vista in May ; this latter may be distinguished by the small and 

 crowded cymes at the end of the branches, 



8. L. Greggti (sp. nov.) : viride, glabrum, caulibus pluribus e rhizomate ligneo adscendentibus a basi 

 fruticulosa ramosis angulatis ; foliis alternis inferioribus oblanceolatis superioribus lanceolatis patulis ; 

 glandulis stipularibus geminis rarius inconspicuis ; cymis virgatis dissitifloris contractis ; pedicellis calyce 

 S£epiu3 longioribus ; sepalis lanceolatis acutis trinerviis margine glandulosis; filamentis basi brcvi dilata- 

 tis 2-denticuIatis ; stylis liberis; stigmatibus cohasrentibus ; capsula depresso-globosa cuspidata calycem 

 subsequante 10-valvi, dissepimentis secundariis incompletis. — Near Saltillo, Sept Ist, 1848, Dr, Gregg, 

 No. 387. — Stems about 10 inches high. Leaves similar to those of L. Virginianum, thecapsule and sceds 

 of the same size. Distinguished from L. rupestre by the broader leaves, much smaller flowers and fruit, 

 the singular united stigmata, which I have found in all the flowers (and many of them) examined by mc, 

 and the hairless false dissepiments. Apparently near L. Mexicanum, but that species has opposite leaves, 

 &c. [L. Mexicanum, at least the plant coU. Coult. 759, is a very different species, larger in all its parts, 

 with broad ovate sepals, not glandular on their margins. A. G.] 



tf Secondary dissepimenU complete and similar to the primary ones: capsule splitting into 10 closedcoccL 



9. LiNUii ViKGiNiA.\uM, Xznn. Biennial (or perennial?) with a fibrous root (all the others have a ta- 

 pering simple root). 



Var. ^. opposiTiroLiuM : caule erecto ; foliis plurimis oppositis obovatis seu oblongis obtusis ; panicula 

 patula; sepalis integerrimis late ovatis acutis ; petalis flavis. — Littlc Eock, Arkansas, in springy nio- 

 rasses with Sphagnum. Flowers smaller than in the usual form. 



Var. y. ANGxrsTiFOLiUM : caule stricto ; foliis erectis ; panicula contracta sparsiflora ; sepalis lanceola- 

 tis capsulam superantibus, ujterioribus glandulosis; petalis sulphureis. — Western Arkansas, on sandy hills 

 in open woods. Flowers and fruit larger than in the conmion form. 



G. Engelmann, 



\ 



