Tabula 2806. 



ERYNGIUM PILULARIOIDES. llemsley et Rose. 



Umbelliferae. Tribus Sanicule\e. 

 E. pilularioides, IJanshy et Rose in U.S. BrpL Agric. Contr'h. Nat, 



Herb. vol. viii. p. S-'^S, excl. f. 18 ; species liabitu E. reptantiSy Hemsl., 

 sed aliter omnino div^ersa, et inter species mexicanas adliue cognitas 

 foliis parvis angustissiinis aliis fistulosis aliis concavo- vel plano-cou- 

 vexis distincta. 



llerha glabra, reptans, caulibus fere filiformibus circiter 10 cm. 

 longis ad iiodos radicantibus. Folia dimorpha vel trimorphaj fascicu- 

 lata \ alia minora, 1-2 cm. longa, linearia, acuta, breviter vaginata, 

 vaginis apice 1-vel 2 aristatis, nonnunquani paullo majora, lamina 

 basi in margine aculeis paucis instructa ; alia (petioli ?) ex eodem 

 fasciculo longiora, i:isc[ue ad 8 cm. longa, circiter 1 mm. diametro, 

 teretia, plurisulcata, curvata, fistulosa, intus septis transversis inter se 

 circiter 5 mm. distantibus instructa. Gapitula intra folia sessilia vel 

 breviter pedunculata, 10-12-floraj cum bracteis patentibus circiter 

 1 cm. diametro. Involucri bracteae 6-8, lanceolatae, integrae, rigidae, 

 purigentes, flores paullo excedentes. Faleae bracteis similes, angus- 

 tioreSj complicatae, flores vix superautes. Calycis denies rigidi, 

 acuminati, quam petala recurva longlores. /'e/a/a apice denticulata. 

 CarpeUa cum cal^ce 2-3 mm. longa, squamis coiioideis patentibus 

 dense papillosis vestita ; vittae 5, quarum 2 commissurales ; styli erecti 

 calycem aequantes. — E, Prinyleiy Hemsl. et Rose, loc. sup. cit. p. 331, 

 quoad figuram tantum. 



Mexico : Eastern Hidalgo, in shallow hollows of meadows^ C, G. 



Fringlp, 



y 



This is a very distinct species, and remarkable among those T have 

 examined in having fi^-tular leaves ; but Dr. W. L. Jepson, of the 

 Californian University, to whom I Iiave pointed out tliis peculiarity, 

 tells me that several of the larger North American species havefistular 

 leaves, and on turning to the description of E. ariiculatum^ Hook. 

 (E, jietioIatu7n, Hook.) I find the following interesting field-note by 

 Geyer : ^ In April the young plants are wholly submerged, and present 

 the appearance of some articulated Jinicus ; the leaves, or rather the 

 petioles, being similarly terete and jointed. On emerging above the 

 water these petioles expand into luminaj at the top, retaining the 

 jointed swollen character in the costa. The radical petioles are 

 8-10 inches long ; those of the stem, in proportion as they arc out of 

 the water, become flattened and the margin spinuloso-ciliate.' It is 

 probable that E. 2^i^^^l<'^^''^oides is submerged in the early stage of 

 growth, and produces its flowers and fruit after the water lias dried 

 up. Dr. Hose describes it as an annual — \V. Botting Uemsley. 



Fig, 1, portion of b-^se of a flat leaf; 2, section of a fi^^LuLir leaf; 3, a paTe ; 

 4, aliower; 5, a young mericarp ; 6, a petal; 7, a section of a mericarp ; 8, fee ale 

 from the tame. A/l enlarged. 



