80 SPRING FLORA 



on corolla-throat; filaments short. Ovary 4-divided; style 

 slender; stigma capitate or 2-lobed. Nutlets 4, erect; often 

 white and shining-; attached by their bases. 



Annual; flowers dirty-white 1. i. arvense 



Perennial; flowers yellow or yellowish. 



Corolla-tube not crested 2. L,. pilosum 



Corolla-tube prominently crested 3. L.. augustifolium 



1. L,. arvense L, Corn Gromwell. Annual or biennial, ap- 

 pressed-pubescent; 6-20 inches high. Leaves lanceolate or nar- 

 rowly elliptical; mostly sessile. Flowers in loose spikes. Calyx- 

 segments longer than the corolla-tube or equalling it. Corolla 

 funnelform; puberulent in the throat. Nutlets brown. In fields 

 and waste places, often in patches. April-August. Introduced. 



2. Li. pilosum Nutt. Perennial from thick roots; hirsute. 

 Stems several from one root; very leafy; 8-18 inches high. 

 Leaves narrowly lanceolate; alternate (%); acuminate; sessile. 

 Flowers faintly perfumed; dull-yellow; in a terminal and 

 crowded panicle. Calyx-segments densely hirsute, shorter than 

 corolla-tube. Corolla salverform; with scattered hairs on the 

 outside. Styles longer than the filaments. Nutlets ovoid, 

 acute; bluish-white and shining. Dry fields. April-June. 



3. L.. angustifoliiim Michx. (L. linearifolium Goldie). Indian 

 Paint. Perennial and tufted from a deep root; minutely stri- 

 gose-pubescent, branched; 6-24 inches high. Leaves linear, 

 sessile. The earlier flowers showy with bright yellow salver- 

 form corolla, their lobes fringed and their tubes 3-5 times the 

 length of the calyx-segments; the later flowers inconspicuous 

 and cleistpgamous with recurved pedicels in fruit. Nutlets 

 ovoid; white, smooth and shining. In dry soil. April- July. 



5. AMSINCKIA. 



Rough-hairy annuals, with alternate entire leaves. Inflor- 

 escence racemose or spicate. Flowers yellow or orange. Calyx- 

 lobes 5 or sometimes 4. Corolla salverform, without crests or 

 processes. Filaments very short. Style filiform, included. 

 Nutlets 4, smooth or rough; atached to the style to above the 

 middle. 



Calyx-lobes linear, acuminate 1. A. intermedia 



Calyx-lobes oblong, obtuse. .1 2. A. tesselata 



1. A. intermedia F. & M. Erect, often much -branched, 1-3 

 ft. high; stems and branches with scattered white bristles. 

 Leaves oblong-lanceolate to linear; obscurely veined; densely 

 hispid-bristly. Inflorescence at first corymbose at top, but 

 lengthening into a leafy raceme, which becomes 5-10 inches 

 long; peduncled; covered with curved stiff hairs. Calyx-seg- 

 ments rusty-hispid. Nutlets muricate-scabrous; much incurved. 

 In waste places, especially around trash-piles. May-June. 



2. A. tesselata Gray. Erect, coarsely hispid, 1-2 ft. high. 

 Leaves linear to oblong-lanceolate. Spikes loose; 5-6 inches 

 long when fully developed. Sepals 3 (1 narrow and 2 broad); 

 rusty-hispid, enlarged in fruit. Nutlets abruptly acute; not 

 keeled, but flattish on the back; their surfaces resembling 

 cobblestone pavements. Same habitat and time of flowering as 

 No. 1. 



