CRUCIFEK.E. !)I) 



petals; filaments sometimes (lilat('<l or toothed helow ; anthers 2(-l)-cclkMl, 

 loiigitiulinally dehiscent, eoinmonly innate, entire or sa^Mtlate at the biise, randy 

 contorted Or spirally coiled. Honey glands always present upon the rerepUul.-, 

 distinct or more or less confluent in lateral jtairs flanking the shorter bUaieus, 

 or less frcijuently also between the bases of the longer j)airs of stamens. Car[H!!, 

 2, lateral, united; ovary superior, 2-f'elled (rarely unicellular, or by the intrusion 

 of false transverse partitions several-celled in Ruphanus) ; cells collateral or in 

 one tribe (Cakilinea:) superposed, 1-many-seeded ; placentae parieUil or rarely 

 basal; style simide, elongated, short, or undeveloped, often persistent; stigma 

 terminal, regular and circular in outline or more or less distindly 2-lobed ; the 

 lobes being either lateral or median : ovules horizontal or pendulous or rarely 

 (when solitary in indehiscent cells) erect, campylotropous or aniphilropous. Fruit 

 capsular, 2-valved, or rarely indehiscent, eith(?r elongated (silique) or relatively 

 short and broad (silicel), terete, prismatic, or more or less strongly compressed, 

 either laterally and parallel to or obcompressed contrary to the partition, some- 

 times inflated or wing-margined ; seeds exalbuniinous ; the outer coat often 

 becoming mucilaginous when moistened ; embryo with rare exceptions curved ; 

 cotyledons flat, entire or rarely lobed, lying either with tlie surface against the 

 mostly ascending radicle (incumbent, in cross-section thus, cQ] ), or with one 

 edge toward the radicle (accumbent, in cross-section thus, oQ), or less freciuently 

 longitudinally plicate and partially enveloping the radicle (couduplicate, in 

 cross-section thus, <^), or finally (in certain foreign genera) spirally coiled. — 

 A large order, represented in almost every part of the earth, but preferring tem- 

 perate and subarctic regions. Plants of considerable constancy of floral character 

 but with much variability in fruit, economically important as furnishing a number 

 of vegetables (cabbage, turnip, cauliflower, Brussels-sprouts, radish, &c.), sahul 

 plants (water-cress, garden-cress), and condiments (mustard, horse-radish). 



Tkibk I. ALYSSINEiE. Fruit short, orliicidar, elliptical, or short-oblong, rarely 

 more elongated, lanceolate or linear (some species of Dnifxi), always more or less 

 compressed parallel to the partition, 2-celIed, dehiscent, 'i-niaiiy-si-fditl. or rarely 

 (in .4 <^*/san«s and certain species of Draba) indehiscent or nearly so, or through the 

 obliteration of the partition 1-celled, 1-seeded (Al/ii/sunits). Valves flat or moder- 

 ately convex. Cotyledons accumbent, very rarely (in Drnhi) incumbent. Pul>es- 

 cence altogether or in great part l>ranclie<l, only in the genus Thysanocarpfix quite 

 simple. 



* Fruit oblong, elliptic or lanceolate, rarely linear, 2-celle(l, dehiscent (sunutiinos vrry 

 tardily so), 2-several -seeded : stamens unapponflagcd. 



1. DRABA. Sepals sliort and broad, obtuse, equal at tbe iKi.oe. Petals conunonly <>l>ovate. 

 entire or rather deeply bifid. Style short or slender and suniewhnt elongated ; stiijma simple 

 or very slightly lobed. Septum thin, membranaceous. Seed.s I>iseriatc, neither margined 

 nor winged. Cotyledons accumbent or rarely inonmlient. I'nbescence bn\nrhed. 



* * Fruit orbicular, indciiiscent, l-cflleil, l-scedi'<l. 



2. ATHYSANUS. Flowers miiuite. Sepals ovate, rounded, equal at the lia-^ 



Petals minute, linear, or wanting. Stamens 6, suliequal ; filaments slender; ai.iM.,- - . ■, . 

 Stigma small, .sessile. Ovules 3 or 4, only one maturing. Fruit wingless. Pulic^cence 

 liranchod ; rhe liaiis on the fruit usually uncinate. 



