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Show I TRODUOTION. Th r is a lo ely analogous subdivision of plants, in lucling th g nu~ }\;fu cari (or Feath r Hya inth) an l th lli llevalia, w hi h bear both p rf ·t fl w r anl cl 1 bud-like b dies that nev r xpand. rl'h h tt r r mble in this r sp ct cl istoga1nic fl w r , ut differ widely from them in being steril an 1 Not only the a bo1-ted flow r-buds an th ir p dun 1 (which are elongated apparently thr no-h th prin i1le of c mpen ation) ar brightly < 1 ur d, but i the upp r part of the spik - all, n d nut, £ r the sake of guiding ins cts t th in n pi u u p r£ ct flow rs. From such cas s a. th w 1n y 1 a n to c rtain Labiatm, £ r instan , Salvia Horn~in1~m, in which (as I h ar from 1\Ir. Thi 1- t n y r) th u p r bracts are enlarged and brightly l ur 1, n d ubt £ r the same purpose as before, with th fl w r suppr ed. In th Carr t and some allied Umbellifcrm, the centr 1 fl. w r h its p tals somewhat enlarged, anJ th s f <lc rk purpli h-red tint; but it cannot ue supp <l th< t thi n small flower makes the large whit nn1 l t all more con picuous to insects. The centra1 fi w r ar aid* to be neuter or steril , but I bt· in 1 by artificial fertili ation a seed (fruit) appar ntly p r£ t fr 1n ne such flower. Occasionally tw r thr f th fl wers n xt to the central one ar simi- 1 rly h, n t ri 1; and according to Vauchert "c tte ino-uli'r d'g'n'ration s''t nd quelquefois a l'omb lle nti' r ." That the modi:fi d central flower is f n fun tion~.l i1np rtance to the plant is ahnost c rtain. t 111 y rh 1 b a remnant of a former and anci nt n iti n f the sp cie , when one flower alon , the • 'The Engli h Flora,' by ir d'Europe,' 1841, tom. ii. p. 614. J. . mith, 1 2!, vol. ii. p. 39. On the Echinoplwra, p. 627. t ' Hist. I hys. des Plantes 9 < n tn1l n " f Ill< l t n 1 yit lcl l <1 • n. in th , lllll L llif r u < j t i ncl. w ·on • t > Jllr e otHl 'l• , tlu of nH lH eiou r tho ' whi ·h hav' th ·ir ·.· •: .'f parato1l nt n th . .'an pLtnt. ' he ftuw t> t'.' nuec·.· "trily nt "h !I tho:o lf n . •.' iu·lt11l rtHlirn at 1JU ti · tion,' chap. • vi. 2ud l i t. vol. Ji. p. : :J . t t. Z ·ituug,' 1 '7, p. G7. |