Erect annual with rather slender, simple, terete, very finely striate, margined stems 25-45 cm. long; internodes between cauline lvs 7-8 cm. long. Basal lvs few, thin, 3-5-nerved, reticulations evident; lamina 25-35 × 10-16 mm., narrow-ovate to ovate or occ. obovate, subacute, narrowed into thin flat petiole 15-20 mm. long or more. Lowest cauline lvs similar but shorter; upper in c. 4 pairs, ovate-cuneate to subcordate, sessile, ± 20 × 10 mm. Infl. a terminal 4-7-fld bracted umbel, with or without a few long-peduncled smaller umbels or solitary fls. Bracts lflike, subtending umbel. Calyx nearly 1/2 corolla-length, cut at least ⅔ way into linear-subulate 1-nerved subacuminate lobes. Corolla c. 16 mm. long, cut ⅔way into obovate rounded lobes.