Genus 28 



MUSTARD FAMILY 



I. Conringia orientalis (L.) Dumort. 



Hare's-ear, Treacle Mustard. 



Fig. 2061. 



Brassica orientalis L. Sp. PI. 666. 1753. 

 E. perfoliatum Crantz, Stirp. Aust. i : 27, 1762. 

 Brassica perfoliata Lam. Encycl. i : 748. 1783. 

 Erysimum orientale R. Br. Hort. Kew. Ed. 2, 4 : 



117. 1812. 

 Conringia perfoliata Link, Enum. 2: 172. 1822. 

 C. orientalis Dumort. Fl. Belg. 123. 1827. 



Stem usually erect, simple, or somewhat 

 branched, l°-3° high. Leaves light green, 

 obtuse at the apex, 2'-$' long, l'-2' wide, the 

 upper smaller; racemes at first short, much 

 elongating in fruit; pedicels slender, ascend- 

 ing, 4"-8" long; petals about V long; nearly 

 twice as long as the sepals ; pods 3'-s' long, 

 about i" wide, 4-angled, spreading. 



In waste places, New Brunswick to Manitoba, 

 Oregon, Delaware, Missouri and Colorado. A bad 

 weed in the Northwest. May-Aug. 



29. HESPERIS [Tourn.] L. Sp. PI. 663. 1753. 



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, wing- 

 less ; cotyledons incumbent. [Name from Hesperus, evening, when the flowers are most 

 fragrant.] 



About 25 species, natives of Europe and Asia. Type species ; Hesperis matronalis L. 



I. Hesperis matronalis L. Dame's Rocket 

 or Dame's Violet. Fig. 2062. 



Hesperis matronalis L. Sp. PI. &6-i. 1753. 



Erect, simple or sparingly branched above, 2°-3° 

 high. Lower leaves 3'-8' long, tapering into a 

 petiole, ovate or ovate-lanceolate, acute, dentate 

 with minute teeth, pubescent on both sides; upper 

 leaves similar but smaller, sessile or short-petioled ; 

 flowers 8"-i2" broad, pink, purple or white, fra- 

 grant ; blade of the petals widely spreading, about 

 as long as the claw; pods 2'-4' long, spreading or 

 ascending, contracted between the seeds when ripe. 



In iields and along roadsides, escaped from gar- 

 dens, Nova Scotia to Ontario, Pennsylvania and 

 Iowa. Native of Europe and Asia. May-Aug. Old 

 English names are Queen's- or Dame's-gilliflower ; 

 night-scented, rogue's- or winter-gilliflower. Dam- 

 ask-violet. Sweet-rocket. Summer-lilac. 



30. ARABIDOPSIS (DC.) Schur. 

 Enum. PL Trans. 55. 1866. 

 [PiLOSELLA (Thai) Kostel. Enum. Hort. Prag. 104. Hyponym. 1844.] 

 [Stenophragma Celak. Flora 55 : 438. 1872.] 

 Annual or perennial herbs with the aspect of some species of Arabis, pubescent with 

 forked hairs, with. branched slender erect stems, entire or toothed leaves and small white or 

 pink flowers in terminal racemes. Style very short; stigma 2-lobed. Siliques narrowly linear, 

 the valves rounded, nerveless or finely nerved, dehiscent. Seeds in i row in each cell in the 

 following species, in some European species in 2 rows ; cotyledons incumbent. [Named from 

 its resemblance to Arabis.] 



About 12 species, natives of Europe, Asia and North America. Type species : Arabis Thaliana 'L. 

 Annual ; introduced weed. i. A. Thaliana. 



Perennial ; indigenous. 2. A. novae-angliae. 



