- Spikelet of Wild Oat, sativa, with two fertile florets, A.
The type form is the Caucasian species roseum of botanists, hardy perennial, with finely cut leaves and large flower heads, having a ray of deep rosecoloured ligulate florets surrounding the yellow centre or disk.
Purpureus, i z ft., with pink flower-heads, having narrow twisted ray-florets; E.
Drummondii, 2 to 3 ft., with the ray-florets reflexed, yellow at the tip and purplishbrown towards the base; R.
Speciosa, I to 2 ft., is a showy composite, of easy culture in good garden soil; it produces large corymbs of flowerheads, with numerous narrow blue ray-florets surrounding the yellow disk.
Shull (American Naturalist, xxxvi., 1902), the mean number of bracts, ray-florets and discflorets, and the standard deviation of each, was determined on four different days, with the following result: TABLE III.
3 is a single spikelet of the same, containing two florets, with the three stamens of one only protruded.
5 is a spikelet of the female inflorescence, consisting of two outer glumes, the lower one ciliated, which enclose two florets - one (a) barren (sometimes fertile), consisting of a flowering glume and pale only, and the other (b) fertile, containing the pistil with elongated style.
In the summer wheats it may often be observed that the median florets do not fill out so fully as in the autumn wheats.
21), the heads of flowers,Mixe d taken as a whole, are developed centrifugally, the terminal head first, while the florets, or small flowers on the receptacle, open centripetally, those at the circumference first.
So also in Labiatae, such as dead-nettle (Lamium), the different whorls of inflorescence are developed centripetally, while the florets of the verticillaster are centrifugal.
In the capitula of Compositae we sometimes find the florets converted into green leaves.
In the dahlia the florets are rendered quilled, and are made to assume many glowing colours.
This corolla occurs in many composite plants, as in the florets of dandelion, daisy and chicory.