1 1- Polygonaceae 



2. NEMACAULIS Xutt. 



Slender diffuse annuals with spatulate mostly radical 

 Leaves and no stipules. Flowers capitate, each with a 

 free herbaceous bract, perfect. Calyx 6-cleft, colored, 

 enclosing the achene. Stamens 3. Styles '■'< : stigmas 

 capitate. Achene short-ovoid, obscurely 3-angled. 



1. N. denudata Nutt. Stems prostrate or ascending, L5-30 

 cm. long, glabrate, reddish; Leaves narrowly spatulate, 2-5 fin. 

 long, including the short petiole, densely tomentose-hairy on 

 both sides; hractlets of the flower clusters obovate-spatulate, 



2 nun. long, the outer flowerless, the inner smaller, woolly within 

 and glabrous without; flowers yellowish, scarcely 1 nun. long, 

 short pedicellate, glabrous; inner segments broadest; achene 

 0.7 nun. long. (X. Nuttallii Benth.) 



Occasional on sand-dunes along the seashore and in sandy soils in our 

 interior valleys. 



3. LASTARRIAEA Kemy. 



A small diffuse rigid fragile annual, with the aspect of 

 Chorizanthe. Involucre wanting. Perianth involucre- 

 Like, coriaceous, tubular. 5-6-cleft to the middle ; the 

 narrow teeth rigid, awned, recurved and uncinate. 

 Stamens :;. inserted on the throat : filaments very short, 

 with small membranous appendages intervening at their 

 insertions. Achene triangular; embryo curved. 



1. Li. Chilensis Rerny. Branches procumbent or ascending, 

 5-15 cm. long, hirsute; lowest leaves linear, obtuse, hispid-ciliate, 

 l-l' cm. long, cauline in whorls of 4-5, unequal ; bracts 3-6 mm. 



long concealing the flowers; perianth L'-.'J mm. long, its tube 

 triquetrous ; teeth 5, 3 long and 2 short ; anthers small, orbicular : 

 style very short. 



Occasional on dry hillsides, especially in sandy soils. April. 



4. CHORIZANTHE \l. Br. 



how dichotomously branched annual herbs, with 

 rosulate basal leaves ami opposite or ternate stem-leaves, 

 often reduced and bracteate. tnvolucre L-flowered. or 



