50 Proceedings of the Biological Society of Washington. 



PlSTGUICUXACEAE. 



Utricularia oligospermia St. llil. Flowers, October 30. 

 f Utricularia gibba L. Flower buds, October 30. 

 Utricularia macrorhyncha Barnhart. Flowers and ripe capsules, 

 October 30. 

 Rubi wt.ai:. 



Cephalanthus occidentalis L. Immature fruits, October 30. 



Diodia Urea Walt. Carpets areas once cultivated and is common 



elsewhere. Ripe fruits, October 30. 

 Galium hispidulum Michx. Ripe fruits, November 1. 



LoBELIACEAE. 



Lobelia brevifolia Nutt. Flowers and ripe capsules, November 2. 

 Ambrosiaceae. 



Ambrosia artemisii folia L. Flowers, October 30. 



Iva frutescens L. Horse brush. Abundant along narrow channels ; 



rather easily killed by a rise in the level of the water. All staues 

 from (lowers to nearly mature akenes, November 1. 



Carduace \k. 



Eupatorium serotinum Michx. Ripe akenes, October 30. 

 Eupalorium sp. now? (No. 17S1 A). With opposite, petioled leaves 



which are several times longer than broad, this species comes near 



serotinum, but the leaves are almost entire, being merely undulate. 



Flowers to ripe akenes, some fallen, October 31. 

 Eupatorium mikanioides Chapm. Akenes practically all fallen, 



October 30. Originally described from St. Vincent.* 

 Eupatorium tortifolium Chapm, Immature akenes, November 2. 

 Eupatorium rotundifolium L. Ripe akenes, November 2. 

 Willugbaeya scandens ( F. ) Kuntze. Flowers to ripe akenes, October 



30. 

 Trilisa odnratiasima (Walt.) Cass. Flowers to ripe akenes, Novem- 

 ber 2. 

 Laciniaria tenuifolia (Nutt) Kuntze. Both immature and mature 



akenes, November 2. 

 Laciniaria chapmanii (T. & G.) Kuntze. Flowers and immature 



akenes, ( >ctober 30. 

 Heterotheca subaxillaris (ham.) Britt c*c Rushy. All stages from 



flowers to bare receptacles, October 30. 

 Chrysopsis graminifolia ( Michx. ) Nutt. Flowers to immature akenes, 



November 2. 

 Chrysopsis decumbens Chapm. Flowers to immature akenes, October 



30. Originally described from St. Vincent. f 

 Chrysoma pauciflosculosa (Michx.) Greene. Immature akenes, 



October 30. 

 Euthamia graminifolia ( F. ) Nutt. Immature akenes, October 30. 



* Flora 1800, p. 19. r .. 

 t Flora L860, p. 217 . 



