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8 



PLANTJE WHIGHTIAN^ 



D 



th, all repand-tootlied or denticulate. Flowering racemes short and dense ; tlie 



as in T. integrifolium, Endl (Pachypodium integrifolium, Nutt 



flowers, &c., much as in 

 in Torr. §* Gray, Fl. l. p. 96), except that the petals are by no means so longj 

 fruiting raceme becoming four or five inches in length. Pedicels divarical 

 floAver and fruit, six lines long. Siliques (immature) slender, two inches lon 



the 



in 



ly, widely spread 



E,ipe seeds 



In T. integrifolium the pods 



only an inch long, and erect or ascending 



8. Erys 



BC. 



; Hook. Fl. Bor.-Am. 1. p. 64, f. 22 ; var. siliculis 

 breviusculis adscendentibus. Plains at the western base of the Guadaloupe Moun- 



tains, El Paso ; Oct. 



9. SlSYMBRIUM AURICULATU 



caule erecto ramoso ; foHis ly 



(sp. nov.) 



annuum 



seu bienne, parce pilosulum; 

 subruncinatis petiolatis, caulinis basi 

 duobus rotundatis stipuUformibus amplexicaulibus instructis, lobis den- 



tatis 



s^ulatis oblon 



o 



o 



racemo 



gato fructifero prselong 



floribus albis 



m 



siliquis patentibus terctibus gracihbus stylo bre\d nianifesto superatis 



pedicello divaricato quadruplo lon 



o 



seminibus ovalibus. — Yalley of a 



stream, about ten miles from the E,io Grande, below El Paso 



Sept 



Plant 



three feet hie^h, with somewhat the aspect of S. Irio ; but with less deeply 



leaves, and lar<rer, white flo\^ 



Q 



4 



Ily characterized by the stipuliform 



icles 



base of tlie leaf, remote from the lower of the proper 



Flow 



ers three lines long, on spreading pedicels of about the same length;' the spatulate 

 petals conspicuous. Raceme in fruit attaining eighteen inches or more in length. 

 Siliques an inch and a half long, slender, widely spreading, or somewhat ascending 



on the divaricate pedicels ; valves 3 



the midnerve more prominent 



Dr. Gregg has the same species from San Antonio de las Alanzanes, Mexico 



4 



(No. 428 and No. 367), but with less membranaceous leavcs and shorter pods. 



10. S. DiFFUsuM (sp. nov.): perenne, pube 3-4-fida minuta 



caulibus 



ramosissimis difFusis; ramis usque ad apicem foHosis; foliis oblongis obtusis basi 

 attenuatis sinuato-dentatis imisve pinnatifidis ; floribus parvis ; petaHs calyce brevi- 



oribus ; siliquis patentibus teretibus fere subulatis brevibus 



5 lin. longis) 



canescentibus stylo manifesto superatis ; seminibus (immaturis) oblong 



Pass 



of the Limpia, in crevices of rocks 



the 



Aug 



Ste 



about 



a 



foot high, from an elongated and rather ligneous root, much branched, bushy 

 branches and branchlets diverging. 



the 



CauUne leaves about an inch lomr, the low 



somewhat petioled. Kacemes short, branching, often bracteate 



minute in all 



more manife 



at the base. Flow- 

 with the petals barely discernible ; perhaps they 



Siliq 



with a style fully half a line in lcngth 



rcely thicker than their pedicels, tipped 

 This species is apparently allied to S. 



humile of C. A. Meyer, but it certainly is not the plant figured by Ledebour 



GREGGLl, Nov. Gen. 



Calyx basi aequalis, sepalis lineari-oblongis patentiusculis. Petala 



data, ungue ang 



Discus hypogynus inter petala et stamina annularis, contorto- 



lobatus, lobis ante stamina. Filamenta edentula, filiformia. Ovarium oblongum a 



/ 



ti 



Ll 



i: 



* 

 ^ 



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