130 CRUCIFER^. Senebiera. 



S. PiNNATiFiDA, DC. Annual or biennial : stems numerous and slender : leaves short, an 

 inch or less in length, pinnately paited ; segments 7 to 9, lanceolate, entire, or sparingly- 

 toothed: flowers very small, greenish white : petals minute or none : fruit small, 1 to 1 J lines 

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

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

 523; Torr. & Gray, Fl. i. 114. S. did y ma, Pers. Syu. ii. 185. Lepidium didymum, L. Mant. 

 92. Coronopus didymus, Sraith, Fl. Brit. ii. 691 ; Pursh, Fl. ii. 434 ; Nutt. Gen. ii. 65. — 

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

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

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

 summer. (Introd. from Eu.) 



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

 tively narrower : fruit flattened, 1| to 1| lines broad, not notched above nor divided into 

 two lobes, but strongly roughened and somewhat crested by radiating prominences. — Diet 

 vii. 76 ; Pers. Syn. ii. "l85 ; DC. Syst. ii. 525 ; Torr. & Gray, Fl. i. 115 ; Wats. & Coulter, in 

 Gray, Man. ed 6, 74. Coronopus RuelUi, All. Ped. n. 934 ; Pur.sh, Fl. ii. 435 ; Ell. Sk. ii. 

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

 chiefly in the Middle Atlantic States, but occasionally westward ; Portland, Oregon, Hen- 

 derson; less common than the preceding. (Introd. from Eu.) 



15. SUBULARIA, L. Awlwort. (Latin subula, 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. Pflanzenf. iii. Ab. 2, 159. — An interesting and 

 practically monotypic genus of which the exact affinities are still somewhat 

 doubtful. 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 white fibres: leaves 12 to 20, unequal, erect or slightly spreading, thickish at the 

 base, l-l+(-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. & Gray, Fl. i. 113 ; Gray, 1. c. 164, t. 71 ; Brew. & Wats. Bot. 

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

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

 & Schrenk; Maine, Nuttall, -near Portland, Chickerinfj ; New Hampshire, Franconia, Tucker- 

 man, Onles, Miss Slosson, Faxon, Squam I^ake, J. Schrenk ; Ontario, Slater's Bay near 

 Port Sandfield, coll. by botanists of Am. Assoc. 1889 ; Manitoba, Eagle Lake, Fletcher, ace. 

 to Macoun; Wyoming, Yellow-stone Lake, Parry; California, Mono Pass, 10,000 feet, 

 Bolander, Summit Valley, Pringle, Webber Lake, Lemmon : and Vancouver, Sproat Lake, 

 Macoun. Said to have been collected on the Delaware Piv. 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. CAPS]6LiLA, Medic. (Latin capseUa, a little box, alluding to the 

 fruit.) — A small genus, difficult 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; Benth. & Hook. Gen. i. 86; 

 Prantl, 1. c. 189. Bursa, Tourn. Inst. 216, t. 103. Hi/menolohus, Nutt. in 

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



§ 1. BuRSEiE. Fruit obcordate, cuneate, reversed-deltoid in outline: intro- 

 duced from the Old World. 



