Jones: Flora of Illinois, 119. Umbelliferae 197 



11. Spermolepis Raf. 



S. inermis (Nutt.) Mathias & Constance. Sandy soil, occasional. \_S. 

 patens (Nutt.) B. L. Robins.] 



12. ZiziA Koch — Golden-alexanders 



1. Basal leaves ternately divided; fruit ellipsoid, 3.5-4 mm. long at maturity; 



roadsides, fields, meadows, open woods, common. May-June 



Z.- aurea (L.) Koch 



1. Basal leaves ovate or suborbicular, deeply cordate, crenate; fruit oval, 3 mm. 

 long. Ringwood, McHenry Co., Vasey in 1858. [Thaspium trijoliatti7n 

 (L.) Gray, var. apterum Gray; Z. cordata sensu auth., non (Walt.) Koch 

 Z.- aptera (Gray) Fern. 



13. Taenidia Drude 



T. integernma (L.) Drude. Woods and thickets, common throughout 111. 

 May- June. 



14. CoNlUM L. — Poison-hemlock 



C. maculatum L. Waste places, nat. from Eur. June-July. 

 15. Ptilimnium Raf. — Bishops-weed 



(Discopleura DC.) 



1. Involucral bracts or some of them pinnately cleft or parted; calyx-teeth 

 minute; fruit 2-3 mm. long, ovate, acute; marshy ground, s. 111., rare. 

 June-Oct P. captlldceu7n (Michx.) Raf. 



1. Involucral bracts entire, linear, short; calyx-teeth prominent; fruit 1-1.5 mm. 



long, ovate-orbicular, obtuse; swamps, rare. May-Sept 



'. P. nuttallii (DC.) Britt. 



16. SlUM L. — Water-parsnip 

 S. cicutaefoliuni Gmel. Wet ground, locally throughout 111. June-Aug. 



17. Cicuta L. — Cowbane 



1. Leaflets narrowly linear; axils of the upper leaves bearing bulblets; swamps, 

 in the n. half of the state. July-Sept C. bulbijera L. 



1. Leaflets lanceolate; axils of the leaves never bearing bulblets; swamps and 

 wet meadows, locally throughout III. June-Aug C. maculata L. 



18. Thaspium Nutt. — Meadow-parsnip 



1. Flowers deep yellow; stem glabrous; basal leaves either cordate or ternate; 

 woods and river banks, common. May-June. [Thaspium trijoliatum var. 

 flavum Blake; Zizia syhatica Benke in Rhodora 35:45. 1943; T. aureum 

 sensu auth., non (L.) Nutt.] T. sylvaticum (Benke) n. comb. 



1. Flowers pale yellow or cream; stem puberulent at the nodes; leaves 1-3- 



ternate; woods near streams, local. May-June 



T. barbinode' (Michx.) Nutt. 



