Alysscm. XIII. CRUCIFERtE. 163 



5. COCHLEARIA. Tourn. 



Lat. cochlear, a spoon ; refering to the concave leaves. 



Calyx equal at base, spreading ; petals entire ; stamens without 

 teeth ; silicic sessile, obloug or ovoid-globose, with ventricose valves ; 

 seeds many, not margined ; 0=. — Fls. tohite. 



1. C. Armoracia. Horse Radish. — i?«//fc«ni-5. oblong, crenate ; cauline\ang, 

 lanceolate, dentate or incised, sessile ; siiide elliptic. — % A common garden 

 herb, native of Europe. Root flesh)-, large, white, very acrid. Stem 2 — 3f 

 high, angular, smooth, branching. Radical leaves near a foot long, J as wide, 

 on long, channeled petioles. Lower stem-leaves often cut in a pinnatifid 

 manner, upper toothed or entire. Flowers small, in corymbose racemes. The 

 root is a well known condiment for roast beef and other viands. Jn. 



13. aquatica. (C. aquatica. Eaton and 1st edit.) Lis. all pinnatifid, the 

 lower ones doubly and finely so. Wet places, often submerged.^ 



2. C. OFFICINALIS. Scurvij Grass. — Radical lis. cordate, peliolate, caulinc 

 ovate, angular or dentate ; silicks oval-globose, half as long as the pedicel.—: 

 %. Native of Europe and of Arctic Am. Stem 8 — 12' high. Root leaves 4 — 18' 

 long, } as wide. Flowers racemed. Occasionally cultivated for its powerful 

 antiscorbutic properties. Jn. 



6. SUBULARIA. 



Named in reference to the linear-subulate leaves. 



Silicle oval, valves turgid, cells many-seeded ; stigma sessile ; coty- 

 ledons linear, curved. — (1) Aquatic, acaulescent herbs. 



S. AaL'ATicA. Awlworf. 



A small plant growing on the muddy shores of ponds in Maine, Nutt., 

 and near the White Mts., Pickering. Leaves all radical, entire, subulate, an 

 inch in length. Scape 2 — 3' high, racemose, with a few minute, white flowers, 

 on slender pedicels only 2" in length. Jl. 



7. CAMELlNA. Crantz. 



Gr, ^ajiat, dwarf; \tvov, flax. 



Calyx equal at base ; petals entire ; silicle obovate or subglobose, 

 with ventricose valves and many-seeded cells ; styles filiform, persis- 

 tent ; seeds oblong, striate, not margined, || . 



C. SATlvA. Crantz. (Myagrum. Linn.) Gnld-of-pleasure. False Flax. 



Lis. lanceolate, sagittate at base, subentire ; silicle obovate-pyriform, mar- 

 gined, tipped with the pointed style.— (i) In cultivated fields. Stem 1^ — 2i f. 

 high, straight, erect, branching. Leaves roughish, 1 — 2' long, clasping the 

 stem with their acute, arrow-shaped lobes. Flowers small, yellow, in panicu- 

 lated racemes. Silicles 2 — 3" long, on pedicels 2 — 3 times as long. — Said to 

 be cultivated in Germany for the oil which is expressed from the seeds. Jn.^ 



8. ALYSSUM. 



Gr. a. privative ; \vcT(Ta, rage ; supposed bj' the ancients to allay anger. 



Calyx equal at base ; petals entire ; some of the stamens with 

 teeth ; silicle orbicular or oval, with valves flat or convex in the cen- 

 tre ; seeds I — 4 in each cell. 



1. A. sAXATiT.E. Rock Alyssum. Madwort. — St. suffruticose at base, subco- 

 rymbose; Us. lanceolate, entire, downy; silick ovate-orbicular, 2-secded; 5^5. 

 margined. — An early-flowering garden perennial, native ol Candia. Stem If 

 high, with numerous j-ellow flowers in close corymbose bunches. Apr. May.f 



2. A. MARiTiML-M. Lam. Sweet Alyssnm.—St. sulTruticose and procumbent 

 at base; Ivs. linear-lanceolate, acute,' somewhat hoary; pods oval, smooth.— 

 % A sweet-scented garden plant, with fine leaves and small white flowers. 

 Stem a foot in length. Flowers from Jn. to Oct.— All the species of Alyssum 

 are of easy culture in common loamy soils. ■\ 



