p42. PROCEEDINGS OF THE AMERICAN ACADEMY. 
specimen no. 921 was collected in Mexico. With P. tanacetifolia. 
Benth., the species here described has little more than generic affinity. 
In certain forms of P. tanacetifolia the leaves are not unlike those of 
P. Coulteri, but the smaller flowers, shorter calyx, and smaller ovoid cap- 
sule of the latter readily separate the two species. 
Hemsley, in the Biologia Centrali-Americana, Botany, ii. 359, refers 
the Coulter plant above cited to P. glandulosa Nutt. A careful compar- 
ison of P. Coulteri with the type and with authentic material of Nuttall’s 
species shows very clearly that we have to deal with two quite distinct 
plants. Contrasted with P. glandulosa the Mexican P. Coulteri differs 
in having more divided leaves, smaller flowers, shorter capsules, and a 
more villous-hirsute stem. Habitally P. Coulter’ most closely resembles 
. neo-mexicana, Thurber (P. alba, Rydb.), but here again the some- 
what more divided leaves, the subentire corolla-lobes, constantly shorter 
and more ovoid capsule, and smaller seeds of the former enable one to 
distinguish it at once from the Thurber species. 
Mimophytum, n. gen. of Boraginaceae. Calyx 5-parted, persistent 
but not enlarged in fruit. Corolla tubular-campanulate, with a short 
tube and a spreading 5-lobed limb, bearing in the throat 5 blunt folds or 
scales; lobes 5, imbricated. Stamens 5, adnate to the corolla-tube, 
included ; anthers small, obtuse. Ovary 4-lobed; style terete; stigma 
compressed-capitate ; ovules subhorizontal. Nutlets 4, sometimes only 
1 or 2 attaining maturity, depressed, obliquely affixed to the gynobase, 
and when removed revealing. an ovate-triangular scar, convex above, 
flattened beneath, glochidiate over the entire upper surface. Seeds sub- 
horizontal. Herbaceous perennials with trailing habit, alternate leaves, 
racemose inflorescence, and pale blue or whitish flowers. 
M. omphalodoides, n.sp. Stems 6 dm. or more in length, some- 
what bifureately branched, glabrous or sparingly pubescent: leaves 
petiolate ; blade ovate, acuminate, 2 to 7 cm. long, 1 to 4 cm. broad, 
acute, entire, deeply cordate, dark green and sparingly sub-appressed- 
hirsute above, becoming somewhat tuberculate in age, paler and strigillose 
beneath, thin and membranous, 5-7-nerved from the base ; petioles slen- 
der, 1 to 6 em. in length, pubescent with spreading hairs: inflorescence 
terminating the stem and branches in elongated slender subsecund 
strigillose racemes ; pedicels filiform, 2 cm. or less in length, spreading 
or somewhat recurved: calyx about 4 mm. high, deeply 5-parteds 
divisions lance-oblong, acute: corolla 5 to 6 mm. long, 5-lobed to neat 
the middle; tube upwardly expanded, bearing in the throat opposite the 
base of each lobe an oblong blunt fold or scale somewhat pruinose 02 the 
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