534 



UMBELLIFERAE. 



[VOL II. 



3. Apium leptophyllum (DC.) F. Muell. 

 Fine-leaved Marsh Parsley. (Fig. 2689.) 



St'son Ammi L. Sp. PI. 252. 1753? 



Heliosciadium leptophyllum DC. Prodr. 4: 105. 1830. 



Apium leptophyllum F. Muell. Benth. Fl. Austral.' 3: 



372. 1866. 

 A. Ammi Urban in Mart. Fl. Bras, n: Part i, 341. 1879. 



Erect or diffuse, slender, much branched, 3 / -24 / 

 high. Leaves ternately pinnatisect, the lower 

 slender-petioled, the uppermost nearly sessile, the 

 ultimate segments narrow, often incised; umbels 

 #'-i%' broad, sessile, or pcduncled, opposite the 

 leaves; flowers white; fruit ovate, glabrous, about 

 \" long, the ribs equal and prominent. 



In moist grounds, New Jersey; "St. Louis, Mo." 

 (Nuttall). Common in the southern States. Widely 

 distributed in tropical America and the Old World. 

 June-Aug. 



34. ZIZIA Koch. Nov. Act. Caes. Leop. Acad. 12: 129. 1825. 



Perennial mostly glabrous herbs, with ternate or ternately compound leaves, or the basal 

 ones undivided as in Thaspium, and compound umbels of yellow flowers, the central fruit of 

 each umbellet sessile. Involucre none; involuccls of several small bracts. Calyx-teeth 

 prominent. Stylopodium none. Styles elongated. Fruit ovoid, or oblong, glabrous, or nearly 

 so, somewhat compressed, the ribs filiform, not winged ; oil-tubes solitary in the intervals, 

 with a small one under each rib. Seed-face flat. [In honor of I. B. Ziz, a Rhenish botanist.] 



Three species, mainly distinguished from the Thaspia by their wingless fruit. 

 Basal leaves 2-3-ternately compound. 



Rays of the umbel numerous, stout; fruit 2" long. i. 7. aurea. 



Rays of the umbel 2-12, slender: fruit about i" long. 2. Z. Bebbii. 



Basal leaves cordate, undivided; fruit about i \t" long. 3. '/.. cordata. 



i. Zizia aurea (L.) Koch. Early or 

 Golden Meadow- Parsnip. (Fig. 2690.) 



Smyrnium aurcum L. Sp. PI. 262. 1753. 



X. aurea Koch, Nov. Act. Caes. Leop. xa: 129. 1825. 



Thaspium aureum var. apterum A. Gray, Man. 



Ed. 2, 156. 1856. 



Erect, glabrous, branched, i-2# high. 

 Basal and lower leaves long-petioled, 2-3-ter- 

 nately compound, the segments ovate, or 

 ovate-lanceolate, acute, or obtusish at the 

 apex, i'-2' long, sharply serrate; upper 

 leaves shorter- petioled, ternate; rays of the 

 umbels 9-25, stout, ascending, i / -2 / long; 

 fruit oblong, nearly 2" long, about \W wide. 



In fields, meadows, and swamps, New Bruns- 

 wick to Ontario, South Dakota, Florida and 

 Texas. April-June. 



2. Zizia Bebbii (Coult. & Rose) Brit- 

 ton. Bebb's Zizia. (Fig. 2691.) 



Zizia aurea var. Bebbii Coult. & Rose, Bot. Gaz. 



12: 138. 1887. 

 Zizia Bebbii Britton, Mem. Torr. Club, 2: 35. 1890. 



Slender, ascending, simple or branched, i- 

 2 high. Basal and lower leaves slender-pet- 

 ioled, 2-3-ternate, the segments ovate, oblong, 

 or oval, mostly obtuse, % f -\' long, sharply 

 serrate; stem-leaves ternate, or biternate, short- 

 petioled, or sessile, their segments lanceolate, 

 generally narrower than those of the preced- 

 ing species; rays of the umbel 2-12, slender, 

 divergent, I'-jf long; fruit oval, or broader 

 than long, about \" long, often \%" wide. 



In mountain woods, Virginia and West Vir- 

 ginia to North Carolina and Georgia. May. 



