VASCULAR SYSTEMS OF FLORAL ORGANS, 195 
XXXIII. IRIDACE (Pl. XXXII.).—rrx. Crocvs.—In this 
plant the pedicels are so closely adpressed within the sheathing- 
bracts, that they assume very various shapes (1-3). They con- 
tain an irregular distribution of larger and smaller cords. These 
ultimately coalesce into three (4), and then divide again to form 
six regularly distributed cords (5). As soon as the ovary-cells 
appear, six cords are discovered on the circumference and six, 
somewhat elongated, in the middle (6). These become finally 
more circular in outline (7). The sepaline cord (s.) behind the 
ovarian wall now gives rise to the dorsal carpellary cord (7, d.) by 
tangential chorisis. At a level where the septa are distinct, the 
sepaline (8, s.) has now given rise to the staminal (st.) by tan- 
gential chorisis; and the petaline ( p.) by radial chorisis to two 
others (8). 
LX. GLADIOLUS.—The flower of this plant shows a very sym- 
metrical series of cords in the receptacular tube. In the centre 
is a large number of isolated cords (1) as soon as the ovary-cells 
are well formed. These will form the marginal or placentary 
cords. Alternating with each cell is a large cord, and behind it 
a threefold cord, of which the median one will form the dorsal 
cord, and the other two a sepaline and staminal. Higher up 
the central clusters of isolated cords form three irregular masses 
more or less fused together (2); but as soon as the three margins 
are visible, they become isolated, and a mass belongs to each 
triangular termination of a septum. 
Higher up each divides into two cords (3, pl.), while a “ septal 
gland ” (3, s. gl.) appears between them; i. e. a portion of the 
two epidermides are differentiated and separate. While this is 
proceeding, the circumferential cords are dividing up in various 
ways to supply cords for the six leaves of the perianth and the 
three stamens (4). The style is shown in the central cavity. 
XXXIV. LILIACE (Pl. XXXIIL)—rxtr. AsPHODELUS RAMO- 
sus.—The stem below a flower contains two circles of cords. A 
slight protuberance on one side indicates where a bract will be 
formed. A single cord is isolated for this, and a small circle is 
formed below it (2) Of this eircle, one cord is given off for a 
second bract (3, 4). The remaining three now belong to the 
pedicel. The pedicel is somewhat tri-lobed in section (6,7). The 
three eords now multiply by chorisis (8, 9), forming ultimately 
