FEU. 1903. PLANTVE YUCATANA: MILLSPAUGH & CHASE. 



81 



Fimbristylis laxa Vahl Enum 2:292. 



Bracts 2 or 3, leaf-like, 2-6 cm. long, pubescent on the lower 

 surface. Inflorescence a corymbose umbel of 3-6 rays with one ses- 

 sile corymb. Rays 1-4 cm. long. 

 Corymbs of 2-5 spikes, one ses- 

 sile, secondary rays .3-2 cm. 

 long. Spikes rufous brown, 

 ovoid, obtuse, 2.5-3x5-7 mm.; 

 bractlets setaceous, 3-10 mm. 

 long; glumes rufous with a light 

 green midvein, broader than 

 long, obtuse, subspiculate, 

 twice the length of the achene. 

 Style little longer than the 

 achene, villous to near the base. 

 Achene pale stramineous, some- 

 what iridescent, obovoid with acute apex, .8-.gx 1.2 mm.; in section 

 lenticular; surfaces marked by about 16 longitudinal papillate ridges, 

 the interspace transversely marked by less prominent similar ridges. 

 Hab. Pocoboch, Gaumer 2376. 



Mr. C. B. Clarke in Urb. Symb. 2:77, makes F. laxa a synonym 

 of F. diphylla Vahl, Enum. 2:289"; but .Vahl's descriptions of these 

 two, though brief, indicate distinct species which, with the fact that 

 the locality for diphylla is given as "India orientali" and that for 

 laxa as "America meridional!," seems sufficient to Warrant retaining 

 the name laxa for the American form. 



Fimbristylis spadicea (L.) Vahl Enum. 2:294. 



fScirpus s pad ice us L. 

 Bracts 3-4, leaf-like, scabrous on the margin, 13-25 cm. long. 

 Inflorescence a compound umbel, rays 1-6 cm. long; secondary 

 umbels of 3-9 spikes; spikes chestnut, 



ellipsoidal, subacute, 4 x 10 mm., con- - fe -^ . * i * i 



tinuous at the apex as in F. ferruginea; sSsUb, I *EE=E \ 



bractlets short, setaceous; glumes chest- 

 nut with green midvein, chitinous, VB WfiS 9 T ^^H f 

 broadly ovate, obtuse, subapiculate, 

 3-times the length of the achene. Style 

 twice the length of the achene, villous 

 throughout. Achene dark-fuscous, 

 truncate-obovoid, .95x1.1 mm.; in sec- 

 tion lenticular, the dorsum strongly gibbous; surfaces prominently 

 marked by longitudinal lines composed of rows of broad reticulations 

 enclosing deep oblong pits. 



Hab. Mangrove swamp, Sisal, Nov. 9, 1865, ScJiott po/; 

 "uncommon," Chichankanab, Gaumer 



