﻿610 Small : Botany of Southeastern United States 



A distinct species related to Gyrostachys vernalis but more 

 robust and larger in all its parts. The leaf-blades are much 

 broader and the dilated tip of the lip ovate with a more or less 

 strongly truncate base as compared with the oval or suborbicular 

 tip of the lip in Gyrostachys vernalis. The original specimens were 

 collected by Dr. Hale in marshes, Louisiana, no. 444. There is 

 a specimen of this species in Dr. Torrey's herbarium, collected by 

 Prof. L. C. Beck, but no locality is given on the label. 



Gyrostachys Reverchonii. 



Perennial, light green, 3-6 dm. tall : leaves few ; blades various, 

 those of the basal and lower stem leaves linear or slightly broadened 

 upwards ; those of upper stem-leaves linear, 1-2 dm. long, acute or 

 acuminate, reduced to sheathing bracts high up on the stem : 

 spike long, about 1.5 cm. thick : bracts often as long as the flow- 

 ers : perianth whitish ; lateral sepals free, acutish ; petals obtuse : 

 lip rhombic ovate, 6 mm. long, obtuse, surpassed by the sepals and 

 perianth, slightly crisped near the apex : callosities stout, slightly 

 curved, pubescent at the base. 



On damp prairies, Louisiana and Texas. June. 



Gyrostachys Reverchonii is the Texan homologue of Gyrostachys 

 brevifolia. The two species are related by the rhombic-ovate lip 

 which is common to both. The Texan species is more robust 

 than Gyrostachys brevifolia and its stem is more leafy. The fol- 

 lowing specimens should be referred here : 



Texas : Prairies, Lancaster, Dallas County, June, Reverchon 

 [Curtiss, N. A. Plants, no. 2788*] . 



Louisiana : Damp places, May. Hale. 



Gyrostachys triloba. 



Perennial from several cord-like roots. Stems erect, 3-5 dm. 

 tall, slender, sometimes rather weak : leaves mainly near the base 

 of the stem, these oblong or elliptic-oblong, 3-8 cm. long, acute, 

 sheathing at the base, upper stem-leaves reduced to . sheathing 

 scales : spikes 4-8 cm. long, about 1.5 cm. thick : bracts lanceo- 

 late acuminate, shorter than the flowers : lip oblong, 6 mm. long, 

 about equaling the sepals and petals in length, recurved and 3- 

 lobed at the tip, crisped throughout, cordate with 2 basal 

 callosities. 



In sand, Fort Meyer, Florida. Winter. 



The species here described bears but little resemblance to any 



