140 APPENDIX. 



Tribulus terrestris L. A pubescent prostrate or ascending- annual, with 

 pinnate petioled stipulate leaves, and solitary peduncled flowers. Stamens 

 10. Fruit 5-angled, spiny, splitting into 5 3-5-angled segments. An intro*- 

 duced plant belonging to the caltrop family.. ( ZrGOPHYi.LAOEA.E Lindl.) Re- 

 ported as occuring near Pruitland, Muscatine county by Prof. Pammel. 



Prunus chicasa Mx. Chickasaw Plum. A small tree; leaves lanceolate or 

 oblong-lanceolate, acute, serrulate; flowers small, in lateral umbels; drupe 

 red, thin-skinned. Reported from Dubuque (Macbride) and Muscatine (Rep-> 

 pert) counties. (P. anyustifolia Mx.) 



Viburnum p'ubescens petiolum n. var. A low shrub, 3-5 feet high, 

 with slender grayish branches, opposite leaves, and cymose flowers. The 

 leaves are broadly oval to nearly orbicular, acuminate, sharply and some- 

 what irregularly dentate, velvety-pubescent beneath, glabrous above, base 

 cordate, petioles one-half an inch to an inch in length; fruit oblong or oblong- 

 oval, 3-4-tenths of an inch long by 3-tenths of an inch wide; stone mostly 

 plane on one side and convex on the other, two-grooved on both surfaces. 

 Rocky woods; May, fruit ripe in September; infrequent; Johnson and Jeffer- 

 son counties. 



Viburnum prunifolium L. and Sambucus racemosa L. Reported from 

 Dubuque county. 



Sicyos angulatus L. Decatur county 



Apocynum pubescens R. Br. Decatur county, one specimen collected 

 in July, 1897. 



Conringia perfoliate! Link. An erect glabrous annual herb; stem 1-3 

 feet high; leaves elliptic or ovate, entire, sessile and cordate; flowers yellow- 

 ish white, racemose; siliques long-linear, angled, valves 1-3-nerved; seeds in 

 1 row in each cell. Waste places, introduced; reported from Lyon and 

 Story counties. (Ckuciferae.) (C. orlentalls (L.) Dumort.) 



Vicia sativa L. Annual, pubescent or glabrate; spreading, ascending or 

 climbing; stem 1-3 feet long; stipules broad, toothed; leaflets varying from 

 obovate to oblong or oblanceolate, apex obtuse, truncate or retuse, mucron- 

 ate; flowers bluish-purple, 1 or 2 in the axils; pod linear-oblong, glabrous. 

 Waste places; May-August; infrequent; Winneshiek county. 



Cornus circinatci L'Her. Reported from Dubuque and Muscatine coun- 

 ties. 

 January 1, 1900. 



