72 
SYSTEMATIC ARRANGEMENT OF THE SPECIES 
ture-mrai?eI^iih St ' Vl f S ° f ^ “ ° penill « is ^ved -i* iotrastvkr aper- 
paiallel with or transverse to the dissepiment, more or less rhombic, formed bv an incomnlete 
Z a t r h ckesfi-lirt nr!? WhlCh T P K° S tr e CapSUla ThiS Separation takes P lace tlmt. triangular 
and thickest part of the dissepiment which lies next to and below the styles, and which in the species 
ithewcum^le fnut, adheres to the top, while the greater and thinner obcordate or bilobed part 
of the dissepiment remains attached to the base of the capsule in the bottom of the ealvv 
In most instances the stylar portions of the dissepiment, as I will call this part, remain united 
tLrlreTammrfive^ ^ apertnre fr0,n the interior cavit Y of the capsule, and 
S i , if i n ’ 38 as been erroneousl y stated. Tins is, I believe, the case 
leLm d Cat ' C T S T W ' {Grammica )- ' T " Eueuscuia and Enigma the intrastylar 
aperture does communicate with the cells of. the capsule, but the opening is far too small to let tZ 
species T fi T T ? f f*" ** " eCeSSary ’ as in a11 of them the, capsule is circumscissila In some few 
pel hnd each stylar portion of the dissepiment divided into two halves ; in C. pedice/lata these 
hahres are widely distant from one another and adhere to the opposite halved so as “m an 
opening into the capsule transverse to the dissepiment 
In Monogyndla and Callianehe, where the styles are united, there is, of course no intmstvlar 
opening, and m the former the entire dissepiment remains in the bottom of the capsule - in the 
opening. 8 § ^ ^ ^ adhereS to the to P ° f tl6 ca P sule > but > of course!without any 
and tb! S ^ UUS '^e first, in hiS “ £tUdeS ” t0 draw attention ^ ‘he shape of the seed in general 
triillf wS°! i !™ “ P articular - Where all the four seeds are well developed, they are 
\r 1 ger , C0nvex and tW ° smaller flat surfaces > toe latter facing the dissepi- 
Sltt! i 6 “T C6ll; the t0p ° f the seed is rounded <* acutish; the base with 
which it is attached to the placenta (which itself is dilated into a disc, often cup-shaped) is obliauelv 
truncate or somewhat hooked, or rostrate, as Des Moulins terms it. Both flat ^aces^f the seed are 
equai, or the one directed towards the dissepiment is larger than the other. At the truncate base of 
or s Wp!“ ^ 6 f a ^ roundish umbilicus > is the hilum, forming a longer 
or shorter, narrower or broader linear groove, sometimes reduced almost to a point: it nfns T455 15)1 
with it 1/ 6 to 01Q torior angle of the seed ( longitudinal, DesM.), or at right angles 
with it (transverse, DesM.), or it has an intermediate, oblique direction. In some sections I find these 
characters sufficiently distinct; in others they seem to be less reliable - in thp AmonVo n 
have often found them intermediate, and variable, often in s %££ 
only one or two seeds m a capsule come to maturity their shape becomes less distinct and offers no 
good characters. It is scarcely necessary to add that only rip! seeds ought to be ™teed umte! 
ZhTlM PreSSed hard - have led to toe strangest mistakes; winged or ZJd3 
“e oL " UnriPe ^ ^ ^ ^ are smoother and la^er.when lS£ 
The embryo has been supposed to offer good characters; but I have-reason to believe that tw» 
142 firiIfL°r>° r f feW ClrCumvolu f ions ( sucb ^ the one figured by Webb, Phyt. Can. Ill pi 
J.42, fig. 14) are taken from unripe seeds. J P 1 ' 
th. VZZK w “ eh 1 “ T “T “ ,or *““* *■«■»*» « «— i» found » 
.. . y , , lly 2 amose P alous > but in some American species it is formed of entirely dis 
tenet and imbricate sepals, not different from the surrounding bracks,-a character whth pre^n 
Corwolvulacece proper, where only one genus (Wilsonia) is gamosepalous. P 
The specific characters of Cuseutce are found in the thickness of the stem, but principally in the 
inflorescence and m the different organs of the flower and fruit. P P 7 “ 
1<MIQ The inflorescence together with the presence or absence of bracts within it offers good characters • 
less so, the presence or proportion of pedicels. S cnaracters, 
7 8 9 10 M r s sou r 
Botanica 
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