﻿plants fendleriante. 7 



/ 23. S. micranthus (sp. nov.) : caule gracili inferne scabro superne glaberrimo pani- 

 culate ; foliis anguste lincaribus integerrimis scabris (in sicco falcato-contortis) ; racemis 

 gracillimis laxis ; floribus pusillis erectis ; petalis lineari-spathulatis (roseo-albidis) calycem 

 laxum purpureo modicc tinctum) paulo cxccdentibus ; filamentis liberis inclusis; siliquis fili- 

 formibus teretis appresso-erectis ; seminibus immarginatis. — Margins of Santa Fe Creek; 

 July. — The smallest-flowered species of the genus. Allied to the preceding; but the 

 flowers only a line long, and the siliques in all stages strictly erect. These are small in 

 proportion, 1& inch long at most, scarcely thicker than sewing-thread, and quite terete. 

 Stem two feet high ; the slender leaves one to two inches long, the upper nearly filiform. 

 ^ 24. S. linearifolius (sp. nov.) : glaberrimus ; caule erecto apice paniculate ; foliis 

 Iinearibus vel inferioribus lanceolatis acutatis integerrimis basi attenuatis sessilibus rigi- 

 diusculis subglaucis ; petalis obovatis (roseo-purpureis), unguibus calyce laxo subduplo 

 longioribus ; siliquis (immaturis) erectis filiformibus teretiusculis (2i unc. longis) stylo 

 brevissimo apiculatis ; seminibus immarginatis oblongis. — Mountainous regions from 

 Santa Fe to Vegas, on sunny rocks ; July, Aug. — Plant a foot or more in height, from 

 an annual or biennial root, often branched from the base. Leaves H to 2% inches long, 

 pale, rigid, all tapering to a narrow base ; the radical wanting. Sepals turning purplish. 

 Petals half an inch long, or less. Valves of the narrow silique carinate - one-nerved. 

 25. Arabis hirsuta, Scop. Santa Fe Creek, &c. June, July. 

 f26. Turritis glabra, Ldnn. With the last. 



/ 27. T. patula, Graham! in Edinb. New Phil. Jour.; Hook! Fl. Bor.-Am. I. p. 

 40. — Moist, sandy soil and on rocks, Santa Fe Creek ; March to May. — Flowers 

 white, usually tinged with rose-color, rather smaller than in the original specimens.* 



* T. retrofracta, Hook, (which, according to a Greenland specimen from Prof. Vahl, is Arabis Holbollii, 

 Fl. Dan.), has hirsute pedicels, as mentioned by Graham in the original description. We have a variety of 

 this (in flower only), gathered on the Kooskooskee River by the Rev. Mr. Spalding, which has deep purple 

 flowers like a Streptanthus. It is, perhaps, the Streptanthus angustifolius of Nuttall. 



There are no well-defined limits between Streptanthus, Arabis, and Turritis. The subjoined is a new 

 Texan species, which might, perhaps, as well be referred to Arabis fj Lomaspora as to Streptanthus. 

 . Streptanthus petiolaris (sp. nov.) : subglauca ; caule elato ; foliis omnibus longe petiolatis am- 



plis, radicalibus parce pilosis lyrato-sectis, caulinis glaberrimis inferioribus lyrato-3 - 5-lobatis vel hastatis 

 triangulato-lanceolatis repando-dentatis acuminatis, superioribus lanceolatis plerisque integerrimis ; racemo 

 virgato laxifloro ; petalis spathulatis albidis et purpureo tinctis calycem erectiusculum virido-purpurescentem 

 subdimidio excedentibus pedicello apice incrassato brevioribus ; siliquis lato-linearibus complanatis rectis 

 erectis stylo brevissimo apiculatis ; valvis planis venulosis basi tantum uninervatis; seminibus in loculis circ. 

 20 latissime alatis septo trquilatis; funiculis septo adnatis, parte libera dilatatis. — San Marcos Spring, Texas, 

 Mr. Charles Wright ; May. Also raised in the Botanic Garden from seeds which flowered as an annual in 

 September. — Whole plant glabrous, except the base of the stem and the lowest leaves. Stems 2 or 3 feet 



