Suhularia. CRUCIFER^. .o 



as long, and both often strongly curved. — Torr. & Gray, Fl. i. 73. N. cernuum 

 & polymorphum, Xutt. 1. c. 



Var. lyratum, Watsun. Often decumbent and diffusely branched from tlie 

 base : leaves with broader coarsely toothed lobes, frequently narr.nved at the base • 

 pod more turgid, shortly pedicelled. — .\^. lyratum, Nutt. 1. c. Watson, 1. c. 15. 



Frequent in Washington Territory and Oregon, ranging soutliward (especially the variety) to 

 the Sacramento and N. Nevada. ^ ^ j/ 



3. N. Sinuatum, Xutt. 1. c. Stems diffuse, slender, decumbent, smooth or 

 slightly rougliuiied, '^ from perennial creeping or subterranean shoots " : leaves lan- 

 ceolate, usually narrow, 11 to 3 inches long, regularly sinuate-pinnatifid with 

 nuinerous linear-oblong nearly entire lobes : flowers 2 lines long : pods linear, half 

 an inch long or less, tipped with the long style, becoming curved, as also the slender 

 jjedicel. — Watson, 1. c. 15. 



W. Humboldt Mountains, Nevada ( Watson), S. Nevada ( Wheeler), and probably alon<r the 

 eastern base of the Sierra Nevada, ranging eastward to New Mexico and the Upper Mississippi. 



* vr Floivers rather large, white : introduced 2yerennials. 



4. N. officinale, IL Br. Aquatic, smooth, procumbent, rooting at the joints : 

 leaves pinnate witli rounded to oblong obtusely sinuate leaflets, often reduced to only 

 the terminal one : petals 11 to 2 lines long : pods half an inch long, acute at each 

 end, equalling the spreading pedicels ; valves slightly nerved ; style short, thick. 



The Water-Cress of Europe, often cultivated and widely naturalized. 



N. Armoracia, Fries, the common Horseradish, vail doubtless become naturalized in the 

 State. A stout perennial with fusiform root, rarely fruiting ; leaves large, oblong-lanceolate, 

 crenately toothed ; petals 3 Imes long ; pods 2 lines long, turgid. 



18. VESICARIA, Tourn. Bladder-pod. 

 Pod ovate to globose ; valves rigid, strongly convex, nerveless. Seeds few, in 2 

 rows, flattened, rarely somewhat margined : cotyledons accumbent. Style long and 

 slender. — Low densely stellate-canescent herbs; wdth large yellow flowers, and 

 entire or sinuately toothed leaves. 



A genus of about 20 American species, most abundant in Texas and northward, with a few spe- 

 cies in Southern Europe and Syria, which diiler in habit and in their large broadly winged seeds. 



1. V. montana, Gray. Perennial : stems ascending or decumbent, 3 to 8 

 inches long : radical leaves orbicular or obovate on elongated petioles, tlie cauline 

 oblanceolate or spatulate, entire or rarely with 1 or 2 teetli : flowers bright yellow, 

 3 lines long, the petals a little exserted : pods oblong-ovoid, 21 lines long, erect on 

 slender recurved pedicels, the style a third shorter. — Proc. Acad. Philad. 18G3, 58. 

 Lassen's Peak {Lcimnon), and eastward in the mountains to Colorado. 



19. SUBULARIA, Linn. Awlwort. 

 Pod small, ovoid, slightly compressed contrary to tlie partition : valves convex, 

 1-nerved. Seeds several, not winged : cotyledons incumbent. Style none. — A 

 dwarf stemless aquatic, with tufted subulate leaves, and few minute white flowers. 

 A single species, inhabiting the margins of lakes in Europe, Siberia, and N. America. 

 1. S. aquatica, Linn. Scapes slender, 1 to 3 inches high, from slender run- 

 ning rootstocks with numerous flbrous rootlets : leaves usually shorter than the 

 scapes : flowers scattered, less than a line long, the petals not exserted : pods 1 h 

 lines long, about equalling the pedicels, obtuse. 



In pools in Mono Pass on the Upper Tuolumne River (Bolander), at 10,000 feet altitude. Yel- 

 lowstone Lake, Wyoming {Parry) ; lakes of Maine and New Hampshire. 



