Eryngium gracile Delar.

Eryngium gracile Delar. f. Eryng. 54. 1808
Eryngium longirameum Turcz. Bull. Soc. Nat. Mosc. 20': 171. 1847.
Eryngium planum Sesse & Moc. Fl. Mex. 82, in part. 1894. Not E. planum L. 1753.
Eryngium paucisquamosum Hemsl. in Hook. Ic. pi. 2505. 1897. Slender, caulescent, glabrous perennials, 2.5-9 dm. high, from a cluster of woody-fibrous roots, the stems erect, branching above; basal leaves ovate to oblong, 3-8 cm. long, 2-5.5 cm. broad, deeply cordate to rounded at the base, obtuse at the apex, callous-margined, crenate or shallowly crenate-serrate, the venation palmately reticulate; petioles narrowly sheathing at the base, 0.2-3 dm. long, usually exceeding the blades; cauline leaves few, the lower like the basal, the upper greatly reduced, sessile, opposite; heads solitary at the end of the stem or branches small, pedunculate, the flowers numerous; heads bluish, globose, 4-7 mm. in diameter; bracts 8-12, chartaceous, ultimately reflexed, oblong or oblong-oval, 4—15 mm. long, 2-5 mm. broad, obtuse or abruptly acute, entire or with a few minute spinulose teeth, amethystine or glaucous above and green beneath, greatly exceeding the heads; bractlets subulate, 3-4 mm. long, dilated at base, entire, slightly exceeding the fruit; coma wanting; sepals lanceolate, 1-1.5 mm. long, acute, mucronulate, entire; petals oblong-spatulate, about 1 mm. long; styles slender, exceeding the sepals; fruit globose, 1.5-2 mm. long, with a few small bluish lanceolate calycine scales, the dorsal scales few or none.
Type locality: "In locis hutnidis novae Hispaniae," collector unknown.
Distribution: Michoacan to Chiapas and Guatemala (Ghiesbreght S06,Pringle49W, Skutch 120S).

Eryngium gracile là một loài thực vật có hoa trong họ Hoa tán. Loài này được F.Delaroche mô tả khoa học đầu tiên năm 1808.