101 



In condensed clusters of two to five (scarcely axillary and 

 solitary) terminating the branches. 



This species seems to be near M. congesta, (Nutt. Mss., under 

 Tr achy ijjiy turn) but the stem is not " dichotomous " nor " pol- 

 ished," nor leaves " short ovate," nor bracts " membranaceous." 



Sisymbrium rejiexum (Kellogg). Fig. 29. The figure here 

 given, and the accompanying Specimen recently brought from 

 Washoe by Mr. Andrew A. Veatch, show quite a distinct vam^?/, 

 if not a new species of Sisymbrium. The reasons which lead us 

 to consider it distinct from S. paucijiorum of Nutt. are, that this 

 specimen has not " white " flowers but deep rose purple ; nor 

 are the siliques " pendulous " in any strict sense, but strongly 

 refiexed against the stem ; nor are they three times the length 

 of the pedicel, but four or five times. The expressions, " radi- 

 cal leaves," " narrowly o^Zow^-spatulate," seems hardly allowa- 

 ble where they are 'so strictly spatulate ; " nearly smooth 

 above,'' does not at all apply to our specimen. But notwith- 

 standing these objections, from the meagre description given 

 and with no figure to aid us, we candidly confess to some mis- 

 givings whether it may not prove the same when well authen- 

 ticated specimens can be compared. 



Stem biennial, (perennial ?) light greenish gray, with short 

 white forked or branching hairs throughout ; slender, erect 

 branches. 



Leaves all entire, (?) sessile ; radical ones narrowly spatu- 

 late, acute ; cauline ones spatulatc-lauceolate, (obscurely five- 

 nerved) the uppermost lance-linear upon the slender branches 

 (size from one-half to two inches long, one-sixteenth to one- 

 quarter of an inch wide.) 



Calyx erect, at length recurve spreading;, purplish green, 

 (slightly purplish at the base) sepals somewhat spatulate, sub- 

 acute, half shorter than the petals, equal at the base or not 

 saccate. 



Petals beautiful deep rose purple on the lamina, the claws 

 white ; cuneiform-spatulatc, unguiculate, claw scarcely a little 

 longer than sepals, five to seven-nerved ; pistil none, stigmas 

 connate, stamens subequal included, flowers few and nodding, 

 (or sinister). 



Siliques compressed, one-nerved along the center of the 

 valves, straight or a little curved, strongly reflexed against the 

 stem ; pedicels scarcely three-eighths of an inch long, siliques 

 about two inches, somewhat linear-clavate in outline, or taper- 

 ing back toward tlie pedicel. Seeds in a double series ; sep- 

 tum a very thin, translucent membrane. 



The mature fruit not seen. The rudimental ovules with the 

 radical obliquely incumbent, seeds in two series. 



