Polygala 



POLYGALACEAE 



633 



Jan. 



Feb. 



Mar. 



Apr. 



May 



June 



July 



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Pec. 



Miles 



^50 



Map 1307 



Ailanthus altissima (Mill.) Swingle 



Map 1308 

 Polygala paucifoha Wi lid. 



50 



Map 1309 



Polygala polygama Walt. 



few places in woodland in southern Indiana, and along the wooded bluffs 

 of the Ohio River, especially in Jefferson County. 

 Nat. of Asia; introduced and escaping. 



145. POLYGALACEAE Reichenb. Milkwort Family 



4273. POLYGALA [Tourn.] L. 



Lower stem leaves few, usually 2-6, scalelike, 2-8 mm long, narrower than long; 

 leaves at the apex of the stem approximate, alternate, elliptic to oval, 10-40 mm 

 long, 7-20 mm wide; flowers 1-3, rose purple or rarely white, mostly 10-17 mm 



long 1. P. paucifolia. 



Lower stem leaves and flowers not as above. 



Cleistogamous flowers present, borne on short, leafless, basal branches 



2. P. polygama. 



Cleistogamous flowers absent. 

 Leaves lance-ovate, lance-elliptic, narrowly lanceolate to ovate or oblong-ovate, 



mostly 6-30 mm wide; perennials 3. P. Senega. 



Leaves never ovate, rarely more than 5.5 mm wide; annuals. 

 Petals not united into a conspicuous cleft tube. 



Racemes cylindric or conic-cylindric, acuminate or at least distinctly tapering 

 above, mostly 2.2-6 mm broad. 

 Leaves all alternate; sepals suborbicular to lance-ovate; bracts of spikes 



persistent. (See excluded species no. 418, p. 1070.) P. Nuttallii. 



Leaves alternate throughout or whorled; sepals ovate; bracts of the spikes 



deciduous. 



Raceme 1 seemingly conic, the fruits quickly falling so that the flowers and 



fruits present are crowded into a space 0.5-1.5 cm long; "wings" 



shorter than the mature capsule 2 ; seed about twice as long as wide, 



the aril usually over half its length; leaves mostly or wholly ver- 



ticillate. 



Seed hirsute; capsule about 1.5 mm long, on a pedicel a third to half 



its length; racemes wider and looser, the sepals often purplish; 



plant usually 2-3 dm tall, with ascending branches and the racemes 



on peduncles 2-7 cm long 4. P. verticillata. 



'Pennell. Bartonia 13:9. 1932. 



"' Capsule-measurements are of the apparent size of the mature capsules, from which 

 the ripe seed characteristically protrude. 



