Th^ummondiancB. N. O. Compositse. 



TAB. CCXXXVIL 



Krigia nervosa. 



Foliis radicalibus ovatis lyrato-pinnatifidis caulinis subintegris, 

 involucri foliolis ovatis 1-2-nerviis paleis patentibus breviori- 

 bus, nervis validis prominentibus, scapis hispidis. 



Hab. San Felipe deAustin, Texas. Drummond {QoW . III. w. 164). 



In the United States are three genera o( Coinpositce-Cickoracec^y 

 (DC), which have a striking general similarity the one with the 

 other : — I allude, Ist, to Krigia^ Schreb., which has a pappus of 

 5 broad paleae^ and an inner one of 5 alternate setae : 2. Cynthia, 

 Don, which has a pappus of several broad paleae, and an inner 

 one of many setse : and, 3. Apogon, Nutt., which is destitute of 



pappus, or, when present, it is minute and simply composed of 

 5 short and broad paleae. — The learned De Candolle has given 

 their characters very correctly, but has erred by following Nuttall 

 in referring to the Gen us Krigia, K, Caroliniana, which certainly 

 belongs to Cynthia. The K. leptophylla, I have reason to think, 

 is only a var, of the original K. Virginica* K. dichotoma is now 

 acknowledged by Nuttall himself to be nothing more than the 

 autumnal state of the species last mentioned ; and K. montana is, 

 to say the least of it, a very dubious plant, from the high moun- 

 tains of Carolina, and apparently only known to Michaux. 

 Thus it would seem we had only one certain species described, 

 till Mr Drummond detected the present (as well as K. Virginica^) 

 in Texas. The character of -Kl Virainica mav stand thus 



K. 



linis plerumque integris linearibus, involucri foliolis enerviis 

 laevissimis lanceolatis pappo erecto brevioribus, scapo glabro. 



In K. V 



has fallen, 



K. 



longer and whiter, twice as long as the nearly black fruit: (in 



K. Texana, of the same length as the brown fruit). In both, 

 the fruit is deeply striated, and longitudinally impresso-punctate 

 and rough, and the number of paleae and setae constantly 5, 



although Nuttall says that they vary from 5 to 8. 



Fig. 1. Involucre with ripe fruit. /. 2. 3. Achenia: — magnified. 



• This is in Mr Drumraond's 3d Texas Coll, n. 163, also from San Felipe 

 de Austin, 



