188 LOASA FAMILY. 



1. MENTZELIA. (Named for 0. Mentzel, an early German botanist. ) 

 Mowers summer or autumn. ® @ Includes the Bart6nia of Nuttall. 



§ 1. Pod S-9-seeded; flowers small, yellow, opening in sunshine? ® (§) 



M. oligospe'rma, Nutt. Open dry ground from 111., S. W. ; a rough 

 and adhesive homely plant, with spreading brittle branches, ovate and 

 oblong angled or cut-toothed leaves, and yellow flowers less than 1' broad, 

 with 5 wedge-oblong pointed petals, and about 20 (or sometimes more) 

 slender filaments. 



§ 2. Bart6nia of authors, not of Muhlenberg. Pod mostly long, contain- 

 ing many or at least 20 cubical or flat seeds; flowers large and showy; 

 petals l'-2' long ; herbage rough. 



HI. Lindleyi, Torr. & Gray. Cult, from Cal., usually under the name 

 of Bart6nia a-&rea. Plant l°-2° high, with leaves lance-ovate in out- 

 line and deeply pinnatifid, their lobes linear ; flowers with 5 obovate and 

 pointed, bright yellow petals, opening in sunshine, and the very numerous 

 filaments all slender. (I) 



M. ornata, Torr. & Gray. The Bart6nia ornata of Nuttall, a very 

 large-flowered species of the plains of Nebraska and S. ; 2°-4° high, with 

 oblong-lanceolate sinuate-pinnatifid leaves, and yellowish-white, fragrant 

 flowers opening at sunset or on a cloudy afternoon, leafy-bracted under 

 the ovary, and with 10 lance-ovate or spatulate, acute petals, about 2' 

 long, the 5 inner narrower, and the 200-300 filaments all slender ; seeds 

 very many and flat. Sometimes cult. (§) 



M. nuda, Torr. & Gray. The Bartonia n{jda of Nuttall, of the same 

 district, and also in cultivation ; resembles the last, but has flowers of 

 half the size and without leafy bracts under the ovary ; outer filaments 

 mostly broadened ; seeds wing-margined. (§) 



2. EUCNIDE. (Greek: well, nettle; probably in reference to the 

 sharp hairs.) The genus is often referred to Mentzelia. Known in 

 gardens by one species. 



E. bartonioldes, Zucc. (or Mentzelia bartonioides or M. uJngipes). 

 Cult, from Mex. and Tex. ; a tender succulent plant, branching and usu- 

 ally spreading on the ground, bristly, with ovate cut-toothed or slightly 

 lobed leaves on slender petioles, and flowers mostly on still longer simple 

 peduncles (3'-6' long), the 5 ovate petals and very many slender fila- 

 ments fully 1' long. (!) 



3. BLUMENBACHIA. (Named for the distinguished German physi- 

 ologist, Blumenbach.) Includes Cai6phora, and species often referred 

 to LoIsa. Flowers all summer. 



B. inslgnis, Schrad. Cult, from Chile ; rather curious than orna- 

 mental, with palmately about 5-parted leaves ; small flowers with white 

 petals and yellow, red-tipped, inner appendages ; the pod obovate, slightly 

 twisted, with 6 strongly projecting placentae. (J) 



B. lateritia, Gray. From South America, under the name of LoIsa or 

 Cai6phora LATERfiriA ; climbing freely ; with pinnatifid or pinnate leaves 

 of 5 or more lance-ovate divisions or leaflets, which are cut-toothed or 

 some of them again pinnatifid ; flowers almost 2' across, with' brick-red 

 petals ; the long pod at length much twisted. @) 



B. grandiflbra, G. Don (or B. cont6rta). Is a greenhouse climber 

 with orange-red flowers, bearing cup-like scales within, and oblong or 

 ovate pinnatifid leaves, the lobes incised. Peru. 



