Page:Memoir of a tour to northern Mexico.djvu/107

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107
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the lowest leaves most elegantly pectinated, and the upper ones palmately divided; a Zinnia,[1] intermediate between Zinnia multiflora and Z. elegans, and which last season grew finely near St. Louis from seeds picked from these Specimens. Many other Compositae have not yet been examined; a Centaurea maybe found to be distinct from C. Americana, so far the only American species of that genus, which is so extensively diffused in the old world.

Leaving aside several Daleae, Lupini, Giliae, a Gentiana, Buchnera, Castilleia, a number of Labiatae, Gramineae, and many others, I will only mention a few more, which I had time to study more closely. First of all, the beautiful and delicate Heuchera sanguuinea[2] probably the most southern, and certainly the most ornamental species of that genus. Next in beauty comes the bright-flowered Pentstemon coccineus;[3] Lobe-



    Near two other Mexican species, E. Carlinae, Lar., and E. Haenkei, Presl., distinguished from the first by the larger number of linear, not ovate serrate involucral leaves; from the other also by the larger number of those leaves which are generally toothed, not entire.

  1. Zinnia intermedia, n. sp., caule erecto, ramoso, parce adpresse piloso; foliis scabris, inferioribus ovatis, basi obtusis, superioribus subsessilibus ovato-cordatis, acutis; pedunculo apice vix incrassato; involncri ovati squamis marginatis obtusis; paleis cristato fimbriatis; radii ligulis oblanceolatis, extus scabriusculis, ciliatis; acheniis radii linearibus, disci 1-aristatis.

    Common about Cosihuiriachi, flowers in September. Annual, 1 to 2 feet high; leaves I inch long, 6 to 8 lines wide; flowering heads 18 to 20 lines in diameter. The cultivated specimens grew 3 feet high; leaves 3 inches Ions; and half as wide; heads hemispherical, larger, ligulae less acute. Differs from Z. multiflora by the less inflated peduncle, the broader and shorter leaves, the cristate paleae; from Z. elegans, to which the shape of the leaves and of the chaff much resembles, by the shape of the achenia. I may state here that in all the cultivated as well as native specimens of Z. multiflora the paleae are not entire, but fimbriate at the obtuse apex.

  2. Heuchera sanguinea, n. sp., petiolis patenti pilosis; foliis sinu latissimo cordatis, orbicularis, 5-7-lobatis, lobis incisis duplicatim dentatis, ciliatis; junioribus pilosis; scapo nudo, infra parse piloso, supra cum pedicellis calycibusque colorato glanduloso; floribus laxe campanulatis; calycis lobis ovatis obtusis, subaequalibus; petalis lineari-spathulatis persistentibus, cum staminibus pistillisque inclusis.

    Porphyry mountains of Llanos, flowers in September. Scape 8 to 12 inches high; upper part, together with the flowers, bright scarlet; enclosed petals inserted below the throat of the calyx; stamens still lower; filaments equal in length to the orbicular cordate red anthers.

  3. Pentstemon coccineus, n. sp., glaberrimus, glaucus, foliis infimis obovatis, caulinis inferioribus oblongo-linearibus, superioribus linearibus minutis; racemo laxo, pedicellis oppositis, elongatis, 2-bracteatis, 1-floris; calycis glandulosi segmentis ovatis; corollae tubo superne dilatato, limbo bilabiato, labio supenore ad medium bilobo; antheris divaricatis, filamento sterili glabro, apice dilatato; capsula acuminata.

    Llanos, flowers in September and October. Stem 1 to 2 feet high, nearly