COI.ORADO WKKD SlvKDS 
79 
34. CHICORY FAMILY 
{Cichoriaccac) 
Fruit an achene ; pappus consisting of either scales, simple 
bristles (without subdivision or branches), plumose bristles, both 
simple and plumose bristles, or wanting; seeds erect; endosperm 
absent; radicle narrower than the cotyledons. 
Key to Genera 
Pappus consisting- of scales reduced to a crown 1 . . Cichorium 
Pappus of hair-like bristles not plumose, often persistent 
Seeds flattened ; seeds smooth or with minute blunt (not 
spiny) projections near the apex 
Seeds narrowed at the- top, or beaked 2..Lactuca 
Seeds square or even at the top as though cut off transversely. . 3. .Sonchus 
Seeds not flattened 
Pappus usually persistent ; seeds with the tip merely an 
indistinct point i . . Lygodesmia 
Pappus seldom persistent ; seeds with the tip long, slender 
and distinct, 8-12 ribbed 5 . .Ta7'axacnm 
1. Chicory 
{Cichorium {Tourn.) 1 j 
Achenes 5-angled or 5-ribbed, square or even 
at the top as though cut off transversely ; the 
pappus consists of 2 series of short, blunt scales. 
Chicory, Wild Succory {Cichorium intyhiis 
L.) (Fig. 155). — Seeds chamois to bone-brown 
in color ; 2-2.5 mm. long, 1.2-1. 5 mm. wide in 
the widest part, with a light colored, ring-like 
pappus at the apex ; pappus more distinct on 
the darker seeds ; other characters as given in 
the generic description. 
2. Lettuce 
{Lactuca {Tourn.) L.) 
Achenes flattened, 1-5 veined or ribbed on each face, narrowed at the 
apex into a small disk bearing the hair-like pappus bristles, which fall 
separately. 
Key to Soecies 
Seeds 5-8 veined on each face 1..L. scariola 
Seeds mostly 3-veined on each face 2..L. intlchella 
1, Prickly Lettuce {Lactuca scariola 
L.) (Fig. 156). — Seeds buffy-brown in 
color, mostly 5-6 veined, mottled, flat- 
tened, slightly margined, hairy at the 
apex, 2.5-3 mm. long, .6-1 mm. wide. 
. Fig-. 156. Prick- 
ly Lettuce (Lac- 
tuca scariola). x 15 
