ASTER ACEAE— CICHORIACEAE— ARACEAE 



Seneci< Gr< tundsel, Ragwort 

 PI. 15. fig. '> : 1. 2. 3, 4 



1. Heads 10-14 mm. high; plants 3 15 dm. tall; bracts acute, "r obtuse, 



mostly black -tipped ; leaves denticulate S.lu 



2. Heads 6-10 mm high ; plants 1.5-3 dm. tall 



a. Basal leaves oblong, 2.5 7 ? cm. long; stem woolly below, achi 



hispid v balsdmitae 



b. Basal leaves cordate or subcordate; plant-- mostl) glabrous 



c. St; m leaves sinuate-dentate; swamp plant-- S. fialusi 



Antennaria — Ladies' Tobaco i 

 PI. 15. fig. E : l. _'. 3. 4 

 il leaves distinctly 1-nerved impcstris 



Petasites Coltsfoot 



1. Leaves round, deeply lobed P.palmdta 



2. Leaves arrow-shaped, margin sinuate /'. sagiftdta 



Erigeri >n I >ais) 

 1 Stun- simple; heads 2.5 4 cm. broad E. pulchellus 



em branched; heads 1-2.5 cm. broad E. philadclphicus 



Cichoriaceae — Chicory Family 

 Herbs with milky juice and Rowers all alike ii dense involucrate head-: sepals (pappus) in 

 form of scales or bristles or wanting, petals 5, fus d into a ligulate corolla, stamens 5. united by 

 their anthers; ovary 1 celled, 1-ovuled, stigmas 2; flower syncarpous, sympetalous, irregular, epigy- 

 nous. I he corolla has a short tube, beyond which it extends a- a flat, strap-shaped ray. 



I. Leaves entire, long-pointed Nothocalais 



II. Leaves serrate, or deeply cut 



1. Achene long-beaked Taraxacum 

 hene beakless 



a. Flower bright yellow Crepis 



b. Flowers orange Adopogon 



\< ithocalais 



Heads yellow, solitary; leaves narrow N.cuspiddla 



Taraxacum — Dandelion 

 rregularly coarsely dentate T. tardxacum 



Crepis 



PI. 15. fig. F : 1. 2, 3 

 Stem nearly leafless, branched; heads several, yellow C.runcindta 



Stem 1-leaved, branched above: heads 2-0 irgiiiicum 



MONOCOTYLEDONS 

 Araks Arum Order 



Araceae — Arum Family 



Herb- with flowers in a spike which is subtended or surrounded by a spathe ; sepal- 4-6 or 0. 

 petal- 0. stamens 4-7. ovary 1 -celled; flowers syncarpous, apetalous, ovary sunk in the fleshy axis. 



I. Sepals present 



1. Spadix with a leaf-1'ke spathe, i. e.. naked: leaves grass-like irus 



ered by a hood-like spathe: leaves broad Symplocarpus 



II. Sepals absent 



1. Flowers perfect: leaves simple t 'alia 



J Mowers staminate and pistillate; leaves compound tenia 



