130 CRUCIFER.E. SeneUera. 



S. prxNATiFiDA, DC. Animal or liiennial: stems numerous and slender: leaves short, an 

 inch or less in length, piunately jmted ; segments 7 to <), lanceolate, entire, cr sparingly 

 toothed: Howers very small, greenish white: ])etals minute or none : fruit small, 1 to 1-J lines 

 broad, notched both above and below, tims appearing transversely 2-lobed ; its segments 

 turgid and finely wrinkled. — Mem. Soc. Hist. Nat. Paris, i. 144, 1799 (An 7), & Syst. ii. 

 523; Torr. & Gray, Fl. i. 114. S. didi/ma, Pers. Syu. ii. 185. Lepidium didipnnin, L. Mant. 

 92. ' Conmopus didymns. Smith, Fl. Brit. ii. 691 ; Pursh, Fl. ii. 434; Nutt. Gen. ii. 65.— 

 Preferring moist soil of ditches, surface drains, &c., frequent along the sealward from New- 

 foundland to Florida and Louisiana, also from California to Vancouver Isl., Macoiin; 

 occasionally found in dry situations; not frequent in the interior; fl. spring and early 

 summer. (Introd. from Eu.) 



S. CoROXOPcs, Poir. Annual or biennial : stems stouter : leaves longer and segments rela- 

 tively narrower: fruit flattened, \h to i;^ lines broad, not uotdied above nor divided into 

 two lobes, but strongly roughened and somewhat crested by radiating pi-ominences. — Diet, 

 vii. 76; Pers. Syn. ii. 185; DC. Syst. ii. 525; Torr. .& Gray, Fl. i. 115; AVats. & Coulter, in 

 Gray, Man. ed 6, 74. • Coronopus Ruellii, All. Fed. u. 934 ; Pursh, Fl. ii. 435 ; Ell. Sk. ii. 

 139. Coronopus Coronopus, Karsten, Deutsch. Fl. 673. — Roadsides and rubbish heaps, 

 chiefly in the Middle Atlantic States, but occasionally westward ; Portland, Oregon, //e«- 

 derson; kss common tlian the preceding. (Introd. from Eu.) 



15. SUBULARIA, L. Aavi.avort. (Latin sulmla, an awl, in refer- 

 ence to the leaves.) — Small aquatic perennials with clustered subulate attenuate 

 leaves and scapose loosely racemose inflorescence of minute white flowers. — 

 Gen. no. 526; Gray, Gen. 111. i. 163, t. 71 ; Hiltner in Engl. Jahrb. vii. 264; 

 Prantl in Engl. & Prantl, Nat. Pflanzeuf. iii.'Ab. 2, 159. — An interesting and 

 practically monotypic genus of which the exact affinities are still somewhat 

 doHbtful. The following species is widely distributed in the northern temperate 

 zone. A second species from the mountains of Abyssinia is doubtfully distinct. 

 [By B. L. Robinson.] 



S. aquatica, L. Submersed or growing on muddy banks, glabrous : root a dense cluster 

 of bright wliite fibres: leaves 12 to 20, une(iual, erect or slightly spreading, thickish at the 

 base, l-U(-3) inches in length, tapering very gradually to the end: floral axis naked, 1 to 4 

 inches high, floriferous from below the middle : the submersed flowers minute, cleistogamous, 

 and somewhat simplified : fruit obovate, upon short distant spreading pedicels. — Spec, ii 

 642 ; DC. Syst. ii. 698 ; Torr. & Grav, Fl. i. 1 13 ; Gray, 1. c. 164, t. 71 ; Brew. & Wats. Bot. 

 Calif, i. 43 ; Slosson, Bull. Torr. Chib. xi. 118; Day, ibid. xvi. 291. — Edges of ponds and 

 lakes, also muddv banks of running water, Newfoundland, on the Exploits Riv., Robinson 

 & Srhrenk; Maine, Nuftall, near Portland, Chickerinr, ; New Hampshire, Franconia, Tucher- 

 man, Oales, Miss Slosson, Faxon, Squam hake, J. Schrenk ; Ontario, Slater's Bay near 

 Port Sandfield, coll. bv botani.sts of Am. Assoc. 1889 ; Manitoba, Eagle Lake, Fletcher, ace. 

 to Macoun; Wvoming, Yellow-stone Lake, Parr;/; California, Mono Pass, 10,000 feet, 

 Bolander, Summ'it Vallev, Prinqle, Webber Lake, Lemmon ; and Vancouver, Sproat Lake, 

 Macotm. ' Said to have been collected on the Delaware Riv. by Durand, but its occurrence 

 in that region has not been recently substantiated. Easily overlooked and doubtless much 

 more widely distributed : the foliage somewhat resembles an Isoetes. 



16. CAPSlfiLLA, Medic. (Latin capsella, a little box, alluding to the 

 ffuit.) _ A small genus, diflicult of circumscription ; branching annuals with 

 small white flowers and rosulate leaves. — Pflanzeng. i. 85 ; Moench, Meth. 271 ; 

 DC. Syst. ii. 383 ; Torr. & Gray, Fl. i. 116; Bcnth. & Hook. Gen. i. 86; 

 Prantl, 1. c. 189. Bursa, Tourn. Tnst. 216, t. 103. Hi/mennlohus, Nutt. in 

 Torr. & Gray, Fl. i. 117. [By B. L. Robinson.] 



§1. BuRi^E.T:. Fiiiit obcordatc. ouneate, reversed-deltoid in outline: intro- 

 duced from the Old World. 



