294 BOTANY OF THE VOYAGE OF H.M.S. HERALD. 
PHILADELPHE^. 
301. Philadelphus Mexicanus, Schlccht.— P. affinis, Schlecht. !— Wlprs. Rep. vol. ii. p. 151.— 
P. serpyllifolius, A. Gray, PI. Wright, part i. p. 77 !— P. myrtoides, Bertol. Fl. Guatimal. p. 31. t. 
8 !— Nomen vemacul. '' Mirto." Extensively cultivated in tlie gardens of Durango, as well as in 
other parts of Mexico. 
This species varies a great deal in the length of its branches, and the size of its foliage and flower. Gray's 
P. serpylUfolius is an extreme form, which I too shoidd have looked upon as a good species if I had not 
seen numcrons intermediate states— beginning with what Gray terms P. serpyllifoUus, var. foliis floribusque 
majoribas (PI. "\Vright. part ii. p. G4), and my Dnrango specimens connecting it with those in which the 
branches are long and slender, the leaves larger and less covered with hair, and the flowers possessing a 
larger diameter. 
Geographical distribution : Tolucca (Andrieux, 373 !) ; Hacienda del Carmen (Hartweg, no. 458 !) ; 
Zinapan (Coulter, nos. 77 and 78 !) ; Chalco (Andrieux, 374 !) ; Conejan, State of Veracruz (Linden, 580 !) ; 
Jalapa, where it is cultivated, and almost grows wild (Herb. Hook.) ; New Mexico ("Wright!). 
UMBELLIFER^. 
302. Eryngium Wrightii, A. Gray, PI. Wright, p. 78.— E. teme, Hook, et Am. Bot. Beech, p. 
393. (non Lam.) ? Talisco (Lay and Collie !). 
The specimen upon which E. tenue of Hooker and Amott was founded appears to me to be a crippled 
state of E. WrigJitii^ Gray. 
303. Eryngium Cervantesii, Laroch., De Cand. Prodr. vol. iv. p. 92. Talisco (Lay and Collie !). 
304. Eryngium Beecheyanum, Hook, et Am. Bot. Beech, p. 394. Sierra Madre; Talisco (Lay 
and Collie !) ; Topic (Barclay !). 
Does not seem to me, as has been supposed, a form of E. ramosuni, Laroch. ; the radical leaves are 
spathulato-obovate and entire, resemhhng at first sight those of E./ostickm^ Linn. 
305. Eryngium pectinatum, Presl, De Cand. Prodr. vol. iv. p. 96. Sierra Madre ; Topic (Lay !) . 
306. Vel^a TohccensiSj De Cand, Prodr. vol. iv. p. 231 ? Sierra Madre. 
Fruit too young to allow a satisfactory determination. 
ARALIACE^. 
307. Hedera arborea, Hook, et Am. Bot. Beech, p. 394 ! et Sw. ? Tepic (Lay !) 
LORANTHACE^. 
308. Arthenthobium Oxycedrt, Bieb., Torr. et Gray, Fl. N. Amer. vol. i. p. 383. — Viscum 
Oocycedri, De Cand. Prodr. vol. iv. p. 383. Sierra Madre, on Pine-trees; New Mexico (Wright, no. 
1788!). 
309. Viscum flavescenSj Pursh^ Dc Cand. Prodr. vol. iv. p. 280. Sierra Madre. 
310. Viscum Reichenbachianum, Seem., sp. nov. (Tab. LXII.) ; glabrum, ramis teretibus, foliis 
