Særtrj-k at Botanisk Tidsskrift ^4. Bind 3. Hefte. København H»02. 



Arliejder fra den Botaniske Have i Kobenhavn. Nr. 1, 



A 



., e^ 



'New vo;^,c 



Halophild Aschersonii, n. sp"/^^^*^ 



By 



C. H. Ostenfeld. 



Halophila AscJiersonii , n. sp. Rhizome creeping, with scales 

 ill pairs. Shoots erect, issuing from the upper scale of each pair; one 

 pair of scales on the middle of the shoots and on the top two pairs of 

 leaves forming a verticillaster or false whorl; a rhizome of lower order 

 issues often from the base of the upper scale of the shoots. Leaves 

 shortstalked, petiole about V's — ^ri of the leaf, lamina simple, elliptic. 

 8 — 15 mm. long, 4— 7mm. broad, with finely dentate margin, 

 one midvein and two veins within the margins connected with 3 — 5 pairs 

 of transversal veins. Only the female plant is known, female flower 

 terminal, sessile, with a spathe formed by two perfoliate, acute bracts, 

 ovary globose with a 5 mm. long linear upper part, sepals very minute, 

 stigmas 3, linear, 15 — 20 mm. long, with rather conspicuous papillae. 



Habitat. I) West-Indies: St. Croix, the lagoon of Christianssted. 

 creeping in mud at about 1 Meter's depth together with H. Bailloiris Aschs. 



.^ Halophila Aschersonii Ostf. — Natural .size. 



^- February 26, 1892, collected by H. Lassen. 2) Between algae from St. Croix 

 [ collected in 1896 by F. Borgesen. 3) Also older specimens of this plant 



