40 



CRUCIFER^, [ Turrilis, 



FrankL 1st Joum. ed. 2. App. p. 25. Cham, et Schlecht, in Linnma^ v. 1. p. 15. — Erysi- 

 mum prsecox, Engl Bot t 1129. 



■ Hab. Banks of rivers ; abundant from Canada to lat. 68°. Brummond. Dr. Richardson, — Pods 2-3 inches 

 long, linear, compressed, witU a dorsal nerve to the valve. Stigma short, nearly as broad as the valve. 



4. TUKRITIS. Linn. 



Siliqua linearis ; valvis planis. Semina in quoque loculo biserialia. — Flores albidi vel 

 purpureo-roseL 



1. T. glabra; erecta, foliis radicalibus petiolatis dentatis pilis ramosis pubescentibus, 

 superioribus lato-lanceolatis sagittatis glabris semiamplexicaulibus glaucis, siliquis anguste 

 linearibns erectis strictis, petalis vix calyce longioribus, — Linn. Sp. PL p. 930. Engl. Bot 

 t 77T. De Cand, Prodr. v. 1, p, 142. Mich, in FrankL \st Joum. ed. 2, App. p. 26. 



Hab. Hudson's Bay to the Rocky Mountains, and as far north as lat. 64°. 7>r. Richardson, Drummond. — 

 Two or three feet high, often much branched. Leaves 4-6 inches long-, broadly lanceolate, with two blunt 

 points at the base pointing downwards j hence they are sagittate, entirely glabrous, and mostly quite entire. 

 Flowers small, pale sulphur-colour. Pods 4 inches long, very slender. Style short, stigma two-lobed, seeds 

 in two series, 



r r 



2. T. mollis ; erecta, foliis inferioribus spathulatis sin uato-den talis, superioribus lanceo- 

 lato-sagittatis integerrimis, omnibus caule erecto ramoso pedicellisque pilis numerosis 

 patentibus molliter hirsutis, siliquis lineari-elongatis erectis strictis. 



Radix annua, subfusiformis, ramosa. Caulis erectus, superne ramulos plurimos proferens, molliter hirsutus. 

 Folia radicalia patentia, spathulata, petiolata, obtusa, grosse sinuato-dentata : caulina lanceolato-sagittata, 

 basi semtamplexicaulia, obtusa, integerrima, pubescenti-hirsuta, pilis ramosis stellatisque. Flores aibi, dense 

 capitato-corymhosi. Pedicelli fructus longiusculi, pilosi, pilis patentibus. Calyx etiam pilosus. Petala 

 cuneata, calyce subduplo longiora. Siliquce, vix maturee, anguste liueares, unciam et ultra longse, rectse vel 

 leviter curvatie. Stylus perbrevis, angustatus. Stigma minutum, obscure bilobum. Semina biserialia. 



Hab. Shores of the Arctic Sea, between long. 107° and 130°, Dr. Richardson. — A foot and more high; 

 stem stout. Habit of some states of Arabis hirsuta, but the seeds are unquestionably in two rows, and the 

 whole plant is clothed with soft hairs, rather short on the leaves, much longer on the petioles, stem, branches, 

 and pedicels. This plant exists only in Dr. Richardson's collection from the shores of the Arctic Sea. It is 

 perhaps allied to T. hispidula of D C. {Arabis andicola of Humh. et Kunth) : but that plant has the leaves 

 rough with flocculose down, and is an inhabitant of the Andes of Quito, 



3. T. stricta ; erecta, glabra, foliis lanceolatis, radicalibus petiolatis dentatis, caulinis 

 sagittatis semi-amplexicaulibus subdentatis, floribus siliquisque linearibus elongatis erectis 

 strictis, — Graham in Edin. New Phil. Joum, July^ 1829. p. 7. 



Habitus precedentis, sed gracilior. Radix annuus. Caules 1-plures ex eadem radice, erectae, glabrae. 



Folia omnia (ut et tota planta) glaberrima, nisi quandoque in parte inferiore foliorum radicalium et petiolis, 



ubi obscure pilosa et ciliata. Flores albi. Petala obovata, emarginata, calyce duplo longiora. Siliqua 2-3 



uncias longa, sublato-linearis, stylo brevi, valvis multo angustiore. Stigma vix incrassatum, minutum, obscure 

 bilobum, 



Hab. Prairies of the Rocky Mountains, between lat. 52° and 5^^. Drummond. About Fort Vancouver 

 on the Columbia. Douglas. — Flowers pure white, erect as well as the fruit. 



4. T. patula ; erecta, foliis lanceolatis, radicalibus petiolatis dentatis, caulinis sagittatis 



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