VASCULAR PLANTS OF NORTH DAKOTA 95 



Polygonum acre var. leptostachyum Meisner, D. C. Prodr. 

 14: 108. (1856). 



Fort Ransom (O. A. Stevens). 



Insert next after No. 373, Botrys Fremontii: 



Clavis Analytica. 



A. Plants light green, strongly mealy-lnflorescense narrow, dense. 



1. Lobes of the perianth entirely covering the utricle B. alba 



2. LTtricle not covered by the perianth B. feruhitu 



B. Plants dark green, faintly mealy. Inflorescence broad, lax. 



3. Lobes of the perianth entirely covering the utricle B. pagana 



4. Utricle not covered by the perianth. B. nudata sp, nov. 



Insert next after No. 377, Botrys fernlata: 



1235. Botrys nudata Lunell, sp. nov. 



Caulis robustus, )4 — im. altus, de basi crebre ramosus (ramis 

 quidem longissimis, convergentibus), striato-angulattts. Folia 

 obscure viridia, superne paene glabrata, subtus leviter pulverulenta, 

 rhombico-ovata, summa lanceolata, graeilius petiolata, angu- 

 lato dentata. Flores per totam longitudinem ramorum in racemes 

 vel spieas interrupte dispositi. Lobi perianthi cristati, divergentes, 

 ultriculo nudato. Pericarpus opacus, semini atro, levi, nitenti 

 firmissime adhaerens. 



Stem y 2 — im. high, freely branching from the base, with 

 convergent, very long branches, striate-angled. Leaves dark 

 green, almost glabrate above, slightly mealy beneath, rhombic- 

 ovate, the uppermost lanceolate, on slender petioles, angulate- 

 toothed. Flowers in racemes or spikes interruptedly arranged along 

 the whole length of the branches. Lobes of the perianth crested, 

 spreading, leaving the utricle naked, especially in age. The dusky 

 pericarp firmly adherent to the seed, which is black, smooth, 

 shining, 1.25 mm. in diam. 



Collected by the writer on September 24, 1915, in alkaline 

 soil at Leeds, Benson County. 



Insert before No. 433, Silene antirrhina: 



1236. Silene latifolia (Miller) Britten & Rendle, List Br. 

 Seed plant sp. 5. (1907). 



Cucubalus latifolius Mill. Gard. Diet. ed. 8, No. 2. (1768), 

 Fl. Deutsch. ed. 9, p. 64. (1869). 



Silene inflata J. E. Smith, Fl. Brit. II: 292. (1S09). 



Kulm (Brenekle). 



Insert next after No. 435, Silene noctiflora: 



