36 Dansk Botanisk Arkiv, Bd. 2. Nr. 8. 



very incomplete description Buchenau (1871) has given an arnen- 

 dement and later (1903) a latin diagnosis. This minute plant is 

 characterized by the thin and short (1—1,5 mm), linear, patent, 

 nearly sessile fruits with hardly any basal dilation and with flat 

 or faintly rounded back. 



I have seen Preiss's no. 2409 (from Perth) which is quoted 

 both by F. v. Müller and Buchenau as T. minutissima. It con- 

 tained two different forms: (1) larger specimens (see PL IV, Fig. 

 12) with very young fruits and slender somewhat bent scapes, 

 evidently young T. centrocarpa 1 ; (2) minute specimens (see PI. IV, 

 Fig. 13) with ripe sessile fruits and erect scapes — the true T. 

 minutissima. 



It seems to be a well marked species. According to F. 

 v. Müller and Buchenau, its geographical range extends from 

 Victoria to West Australia, but I have not seen any other spe- 

 cimens than the Preiss'ian ones, and am not sure if it has 

 not been confounded with small and young specimens of T. cen- 

 trocarpa. 



6. Triglochin trichophora Nees ab Esenbeck in Lehmann, Plantæ 

 Preiss. II, 1 (1846) 54; emendata. 



It is with some hesitation that I restore the old name T. 

 trichophora Nees, but after having seen specimens of the type 

 collection with Nees's own handwriting on the label I feel con- 

 vinced to do it. 



The species was described by Nees in Lehmann's Plantæ 

 Preissianæ upon Preiss's no. 4211 („in arenoso-conchyliosis humidis 

 prope lacum insulæ Rottennest, 20. Aug. 1839") with the following 

 diagnosis: foliis filiformi-setaceis laxis culmo brevioribus, fructibus 

 erecto-patentibus pedicellatis, oblongo-linearibus trisulcis apice le- 

 viter angustatis. In the ensuing description we get the explana- 

 tion of the singular species-name "trichophora". The author thought 

 to have found hairs ("barba seu coma filorum tenuissimorum") 

 inside the fruit; but, as Buchenau (1871, 497) has fully explained, 

 this observation was wrong the supposed hairs being loosened 

 cells of the innerside of the fertile carpels. 



Buchenau has seen a small specimen of Preiss's No. 2411 and 

 identifies it, "obwohl es keine reifen Früchte besitzt", with T. nana 

 F. v. Müll., but on account of the incorrectness of Nees's name 



1 In some collections only sterile specimens with leaf -rosettes are present; 

 they probably all belong to T. centrocarpa, at least they can not be re- 

 ferred to T. minutissima. 



