297 
lateral lobe, 5 to5.7 cm. long, 3 to 5.5 em. broad, finely serrate; peduncles thick, 5 to 
15 cm. long; rays numerous, about equal, 3.5 to 5 em. long; pedicels 4 mm. long; 
involucels present; fruit oblong, 6 mm. lon, rounded at base; ribs sharp and prom- 
inent; intervals broad, each with 3 small oil-tubes, 4 oil- tubes on the commissural 
side; styles not long, with conical stylopodia; seed with moderately broad sulcus, 
extending to middle. 
Collected by Mr. E, W. Nelson on rocks near the top of the Sierra Madre near Chil- 
pancingo, Guerrero, altitude 9,500 feet, December 24, 1894 (No. 2223), 
Arracacia pringlei Coult. & Rose, sp. nov. 
Perennial; stems 3 to 6 din. high, branching above, glabrous; radical leaves 3 to 
4 times ternate, ovate, acute, coarsely lobed or serrate, 18 to 25 mm. long; peduneles 
3 to 12.5 em. long; rays numerous, 12 to 18 mm. long; involucre of 1 or 2 linear 
scarious-margined bracts as long as or longer than the rays; involucels of 1 to 3 
conspicuous bracts, 12 mm. long, extending much beyond the flowers; pedicels short, 
2mm. long; flowers white (?); fruit narrowly oblong, 8 mm. long, rounded at base, 
slightly beaked; ribs sharp and prominent; intervals broad, normally with a single 
large oil-tube; styles long, withslender conical stylopodia; seed with a narrow deep 
suleus and slightly indented beneath the oil tubes. 
Collected by Mr. C. G. Pringle on summit ledges, Sierra de San Felipe, altitude 
10,300 feet, August 29, 1894 (No. 4844). 
Mr. Pringle writes: ‘Arracacia pringlei is another rare plant, evidently because it 
grows on shelves of nearly treeless summit knobs at over 10,000 feet altitude.” 
Arracacia (?) vaginata Coult. & Rose, sp.nov. 
Stems 5 to 7.5 cm, high; radical leaves twice pinnate; leaflets ovate, coarsely ser- 
rate or cleft, obtuse, wedge-shaped at the base; peduncles 5 to 17.5 em. long; invo- 
lucre of several linear bracts or wanting; involncels of several bractlets, as long as 
the flowers; rays short, 6 to 28 mm. long; pedicels 2 to4 mm. long; fruit ovate, 5 to 
6mm. long; styles long: stylopodia wanting; oil-tubes solitary in the intervals, 2 
on the commissural side; seed strongly involute with closed sinus and inelosing 
a central cavity. . 
Collected by Mr. C. G. Pringle in borders of woodlands, Sierra de Clavellinas, 
altitude 9,000 feet, October, 1894 (No, 6008). 
Berula erecta (Huds.) Coville, Contr. Nat. Ierb. iv, 115 (1893); Sium erectum 
Huds. Fl. Angel. 108 (1762); Berula angustifolia Mart. & Koch. 
Collected by Mr. KE, W. Nelson in the mountains bordering on the valley of Oaxaca, 
altitude 6,800 to 7,800 feet, October 3, 1894 (No. 1567); also by Mr. C. G. Pringle in 
springy places in the Sierra de San Felipe, altitude 7,500 feet, September 10, 1894 
(No. 5544). 
Coaxana, Coult & Rose, gen. noy. (Selinew). 
Calyx teeth obsolete. Fruit oblong, glabrous and glaucous, with low conical sty- 
lopodium bearing a rather long recurved style. Carpel 3- or 4-winged (the lateral 
wings always present, with either 2 intermediates or a single dorsal). Oil-tubes 6 
to 8, with 2 on the commissural side, Seed (immature) suleate beneath the oil-tubes 
with a flattish or concave face.—Caulescent perennials, with ternately compound 
leaves (having very prominent inflated sheaths), no involuere (or sometimes a single 
bract), and conspicuous involucels of narrow toothed bractlets. 
Apparently most nearly allied to Thaspium, but different from it in its foliage, 
conspicuous involucels, conical stylopodia, and numerous oil-tnbes, 
Coaxana purpurea Coult. & Rose, sp. nov. PLATE VY. 
Herbs 9 to 18 dm. high, glabrous and glaucous, more or less purplish throughout; 
radical leaves 3 dm. long, thrice ternate; leaflets reticulate and much paler beneath, 
sharply and doubly serrate; stem leaves much smaller, with very much inflated 
sheaths; peduncles short, 5 to 7.5 em. long; involucral leaf when present 3.6 em, 
