no 



PROCEEDINGS OF THE ACADEMY OF 



[Jan., 



Rosa arkansana Porter, 

 var. a. 



Low bush. 



Flowers about 45 mm. 

 cliam., pink, petals 

 white at base. 



Flowers many together. 

 Anthers longer. 



Stigmas pinkish in bud, 

 without any pink in 

 open flower. 



Sepals foliolar-tipped, 

 narrow, with woolly 

 edges, entire, with 

 many reddish stout 

 gland-hairs beneath 

 and on the sides of tlie 

 apical half. 



Sepals very long (up to 21 

 mm.), projecting far 

 beyond bud. 



Fruit (Aug. 13) smooth, 

 globose, neckless, the 

 sepals erect. 



Buds very glandular. 

 Peduncles glabrous^ 

 shining. 



Prickles slender and scat- 

 tered on stems ; few and 

 scattered on flowering 

 branchlets; straight. 



Infrastipular spines none, 

 or not distinguishable 

 from tlie others. 



Stipules broad (diam. 

 about 12 mm.), resin- 

 ous, not villous. 



R. ■prcetincta, n. sp. {ov R. pecosensis, n. sp. (or 

 var.?). var.?). ^ 



Rather low bush. 

 Flowers pale pink. 



Flowers usually in threes 

 (2-1-1), sometimes 2 

 only, sometimes 4. 



Stigmas deep red in bud, 

 pale pinkish in open 

 flower. 



Sepals quite glandular, 

 the outer with linear 

 lobes. 



Sepals short (up to 13 

 mm.), not projecting 

 much beyond bud. 



Fruit globose. 



Buds glandular. 



Prickles on old growth 

 few and straight; 

 green parts unarmed. 



No infrastipular spines. 



Sitpules often narrow. 



Usually high bush. 



Flowers about 50 mm. 

 diam., deep crimson, 

 petals white at base. 



Flowers in pairs, or often 

 single. Anthers shorter. 



Stigmas pinkish in bud, 

 pale yellow in open 

 flower. 



Sepals foliolar-tipped, 

 narrow, with woolly 

 edges, with linear lat- 

 eral lobes, and wholly 

 without reddish gland- 

 hairs. 



Sepals medium (up to 

 about 15 mm.), pro- 

 jecting moderately be- 

 yond bud. 



Fruit gloliose, S mm. di- 

 ameter, with hardly 

 any neck; sepals per- 

 sistent, erect, but re- 

 flexed immediately af- 

 ter flowering 



Buds minutely pubes- 

 cent, not glandular. 

 Peduncles sparsely sub- 

 lanate with scattered 

 hairs. 



Prickles slender and scat- 

 tered on stems ; few and 

 scattered on flowering 

 branchlets, where they 

 are more or less hook- 

 ed. 



Infrastipular spines ab- 

 sent, or sometimes 

 present in pairs, all on 

 same branch. 



Stipules narrow (diam. 

 about 6 mm.), sparing- 

 ly villous Ijeneath, not 

 glandular. 



