466 FLORA. 



so, entire or rarely toothed; flowers orange -yellow, 12-20 mm. high and nearly as 

 broad; pedicels stout, spreading, 4-6 mm. long in fruit; pods linear, rough, 5-8 cm. 

 long, nearly 2 mm. wide, 4-sided; style short, thick. Dry plains. Ark. to Minn., 

 Cal. and the N. W. Terr. May-July. 



5. Erysimum Arkansanum Nutt. YELLOW PHLOX. Taller and greener 

 than the preceding, 6-10 dm. high, with a more leafy and branched stem, slightly 

 strigose with branched hairs; flowers 20-25 mm. high ; pod linear, tapering at the 

 summit, about I dm. long. Open places, Ohio and 111. to Tex. May-June. 



35. ALYSSUM L. 



Low stellate -pubescent herbs, with small racemose yellow or yellowish flowers. 

 Petals entire. Filaments often dilated and toothed or appendaged. Silicle ovate, 

 oblong or orbicular, compressed, its valves nerveless, the septum thin. Stigma 

 nearly entire. Seeds 1-8 in each cell, wingless; cotyledons accumbent. [Greek, 

 curing madness. ] About 100 species, natives of the Old World. 



i. Alyssum alyssoides (L.) Gouan. YELLOW OR SMALL ALYSSUM. (I. F. 

 f. 1787.) Densely stellate-pubescent, tufted, 0.7-2.5 dm. high. Leaves linear- 

 oblong or spatulate, narrowed at the base, obtuse, entire, 0.6-3 cm - l n g> flowers 

 2 mm. broad ; pedicels 4 mm. long in fruit; pods orbicular, 3 mm. in diameter, 

 margined, minutely pubescent, notched, tipped with the minute style; sepals per- 

 sisting around the base of the pod; seeds 2 in each cell. In fields, Ont. to N. H., 

 N. Y., N. J. and Iowa, and in ballast about the seaports. Also in the Far West. 

 Nat. or adventive from Europe. Summer. 



36. KONIGA Adans. 



Perennial herbs or shrubs, pubescent or canescent with forked hairs, with entire 

 leaves, and small white flowers in terminal racemes. Petals obovate, entire. Fila- 

 ments slender, not toothed, but with two small glands at the base. Silicle com- 

 pressed, oval or orbicular. Seeds I in each cell. Cotyledons accumbent. [Name 

 in honor of Charles Konig, a curator of the British Museum.] About 4 species, 

 natives of the Mediterranean region. 



i. Koniga raaritima (L.) R. Br. SWEET ALYSSUM. SEASIDE KONIGA. 

 (I. F. f. 1788.) Procumbent or ascending, 1-3 dm. high, minutely pubescent. 

 Stem-leaves nearly sessile, lanceolate or linear, 1-5 cm. long ; basal leaves oblan- 

 ceolate, narrowed into a petiole; flowers fragrant, about 4 mm. broad; pedicels 6- 

 8 mm. long in fruit; pods glabrous, pointed, 2-3 mm. long; calyx deciduous; sta- 

 mens not appendaged. In waste places, occasional. Escaped from gardens. 

 Adventive from Europe. Summer. 



37. BERTEROA DC. 



Herbs, pubescent or canescent with forked hairs, the leaves mostly narrow and 

 entire, and the flowers white or yellow in terminal racemes. Petals 2-cleft. Fila- 

 ments 2-toothed at the base. Silicles oblong or subglobose, little compressed. Seeds 

 several in each cell; cotyledons accumbent. [In honor of C. G. Bertero, a botanist 

 of Piedmont, 1739-1831.] About 5 species, natives of Europe and Asia. 



i. Berteroa incana (L.) DC. HOARY ALYSSUM. (I. F. f. 1789.) Erect or 

 ascending, 3-6 dm. high, hoary-pubescent. Leaves lanceolate or oblong, 1-4 cm. 

 long, obtuse, entire or slightly undulate; flowers white, 2-3 mm. broad; pedicels 

 4-6 mm. long in fruit; pod pubescent, oblong, 6-8 mm. long; cells several-seeded; 

 style 2-3 mm. long. In waste places; Me. to Ont., Minn., N. J., and Mo. 

 Adventive or nat. from Europe. Racemes elongating, the flowers and pods very 

 numerous. June-Sept. 



38. HE'SPERIS L. 



Erect perennial or biennial herbs, pubescent with forked hairs, with simple 

 leaves and large racemose purple or white flowers. Stigma with 2 erect lobes. 

 Siliques elongated, nearly cylindric, the valves keeled, dehiscent. I -nerved. 

 Seeds in I row in each cell, globose, wingless; cotyledons incumbent. [Name 

 from Hesperus, evening, when the flowers are most fragrant.] About 20 species, 

 natives of Europe and Asia. 



