274 Arnott on some Neio Species of Loasece, 



LOASA. 



1. L. prostrata. — Caule prostrato flexuoso, foliis oppositis 

 sessilibiis cordato-ovatis exciso-angulatis, pedunculis axillaribud 

 unifloris folio subduplo longioribus, lobis calycinis lanceolatis 

 fructu longioribus petala asquantibus, capsulae valvis setis longis 

 rigidis arete tectis, seminibus ovoideis maximis testa laevi, 



L. prostrata* Gill. M8S. 



Hab. — On la Cuesta de los Manantiales, Cerro de San Pedro 

 Nolasco, in Chile. (April, 1826.) 



This has all the appearance of a twining plant, but is really not 

 so. It is covered with long, rigid, stinging hairs. The costae on 

 the fruit are straight. 



2. L. pallida. — Caulis epidermide laxo nitido, foliis oppositis 

 omnibus petiolatis ovatis grosse dentatis, paniculis oppositis 

 axillaribus folio multo longioribus, pedicellis in dichotomia 

 brevibus florem subaequantibus, lobis calycinis lineari-oblongis 

 petalis duplo brevioribus. 



L. pallida. Gill. MSS. Cavalluna, nom. vern. 



Hab. — Loose debris, on the banks of el Rio del Yeso, near 

 Arroyo de San Nicolas, in Chile, at an elevation of about 3000 

 feet. (March, 1826.) 



This plant is most nearly allied to L. sclarecBfolia, Juss. ; but 

 that does not appear to have the loose epidermis on the stem, 

 and the leaves are much larger, and lobed ; but we cannot speak 

 of the radical leaves of our species, not having them before us. 

 In Jussieu's plant, the pedicels in the fork of the panicle are 

 elongated. 



3. L. coronata. — Caule brevi, foliis oppositis petiolatis pinna- 

 tisectis, segmentis bipinnatifidis, lobulis denticulatis, pedunculis 

 axillaribus 1-floris elongatis petiolum aequantibus, lobis calycinis 

 pinnatifidis laciniis linearibus ovario longioribus, fructu maturo 

 ovali, petalisque maximis dimidio brevioribus, seminis testa 

 reticulata corrugata. 



L. coronata. Gill. MSS. 



Hab. — On both sides of the Cordillera of the Andes, between 

 Mendo^a and Chile, but most abundant on the eastern side, 

 between Las Yseras and Las Cuevas (March, 1821); also found 

 sparingly on the Uspallata range, near el Cerro Pelado. Eleva- 

 tion above the sea, from 8500 to 11,000 feet. 



Whole plant covered with long, rigid, stinging hairs, but par- 

 ticularly the calyx and fruit. The mature fruit differs slightly 

 from the character of the genus : it is oval, and bursts into three 

 valves, from the base upwards ; the placentae then separate from 

 the sides of the capsule, and have the appearance of three arched 

 columellas. Perhaps this may form a new genus. L. acanthi- 

 folia, judging by Jussieu's figure, has a fruit precisely similar. 



This plant first makes its appearance at the Yseras, at an 

 elevation a little above the Rio de Horcones, where it is pretty 



