[ I09° 3
SISYMBRIUM murale.
Sand Rocket.
Lfb
TETRAD YNAMIA Siliquefa.
Gen. Char. Pod cylindrical, burfting with nearly
ftraight valves. Cal. and Cor. fpreading.
Spec. Char. Pods eredt. Leaves lanceolate, deeply
ferrated. Stem fpreading, roughifh.
Syn. Sifymbrium murale. Linn. Sp. PI. 918. Wilden.
v. 3 . 4 9 6 . Dick/. Dr. PI. 1 2.
F O R th is n ew addition to the ca ta lo gue o f Britith p lants w e
a re o b lig ed to M r . D i llw y n , w h o found it in 18 0 1 , g row in g
p le n t ifu lly th ro u gh o u t th e Ifle o f T h a n e t, pa r ticula r ly about
R am fg a te . I t th riv es w e ll on barren fand and ru b b ifh , b u t
m r ich e r or m o ifter pla ce s be com e s fo m u ch m o re lu xu r ian t
as fc a rc e ly to b e k n ow n : in its moft ftarved ftate o n ly it a n -
fw er s to the Linnaean characterfubacaule. I t flowers th ro u gh o
u t th e a u tum n , and r ipens feed in g rea t p lenty .
H a v in g fo r m a n y y ears obferved this fpecies in a ga rd en,
w e can fp eak w ith c e r ta in ty to its d iftin gu ifh in g cha ra cte rs .
T h e root is tru ly annu al, in w h ich it differs from S. tenuifolium
and monenfe. S tem s b r an ch in g , b u t often v e r y fhort, le a fy ,
ro u n d , m o re or lefs ro ugh w ith deflexed hairs. L e a v e s o f a
broad lanceola te figure, tap e r in g at th e bafe in to a lo n g fo o t -
f la lk ; th e ir m a rg in de ep ly a n d . ir regula r ly ferrated, b u t n o t
p in na tifid ; th e ir co lo u r ligh tifh g reen , n o t g lau cou s . L o n g
ra cem o fe ftalks te rm ina te th e ftem and bran che s, b ea rin g fe-
v era l y e llow flow e rs , w h ic h are fmaller and rather paler th an
th o fe o f th e tw o fpecies above m en tioned. T h e pods are lo n g ,
flen de r , and ereCl. S om e ha irs are often found on th e general
and partial flow e r -fta lk s , and (more fpa r in g ly ) on the leaves.
W e p refume th is p lant m a y h a v e be en overlooked as a v a r
ie ty o f S. tenuifolium, fee t. 5 2 5 , b u t th e y are w ith o u t do ub t
q u ite diftinCL