Mione, Leiva G. & Yacher 757, photo by Mione in Peru, 22 Mar 2007 Mione, Leiva G. & Yacher 757, photo by Mione in Peru, 22 Mar 2007

Jaltomata cajamarca Mione (Novon 6: 280-284. 1996)

TYPE: Peru. Department Cajamarca, prov. Contumazá: alrededores de Guzmango, 2,500 m, ladera con arbustos, 9 Junio 1990. A. Sagástegui A. 14389 (holotype: F; isotype: CONN).

Character description
Habit & Height Branching shrub to 1 m
Young axes younger stems angular with 4 or 5 projecting longitudinal ridges, bearing both dendritic and finger hairs to 2.2 mm long
Woody axes older stems (brown) approaching terete; older axes glabrate
Leaves often geminate; ovate, the apex sometimes acuminate; margin entire, repand, or less commonly bluntly toothed; 4--16 cm long, 2--5 cm wide; scabrous, especially the younger leaves; hairs adaxially either all dentritic or having interspersed dendritic and finger hairs, 0.07--0.3 mm long, abaxially mostly of the finger type, rarely gland-tipped, 0.05--0.2 mm long.
Flowers Per Inflorescence to 17 flowered; sometimes branched (with four orders of axes on an isotype).
Peduncle & Pedicel to 19 mm long; pedicel 4--13 mm long
Calyx at anthesis rotate; 6.3--7 mm in diameter; lobe radius 2.7--3 mm; sinus radius 1--2 mm
Corolla short tubular with a rotate limb; limb 16--22 mm in diameter; lobe radius 7.5--9 mm; sinus radius 4--5.5 mm; straight tube 3 mm long by 5 mm in diameter; violet to white, with ring of purple at the tube-limb interface.
Corolla lobes/lobules the limb with 5 lobes alternating with 5 smaller lobules
Flowers remain open at night? Yes
Anther length & color dehisced 0.8--1 mm long.
Stamens 3.4--5.9 mm, exserting 1--4 mm beyond corolla tube. Filaments villous on basal 45--90 %, the finger hairs to 1 mm long.
Pollen Quantity Pollen grains 105,000 per flower, 25--30 µm in diameter
Stigma 0.33--1.06 mm in diameter, usually noticeably broader than the styl
Disk around ovary  
Ovules per ovary 76
Style length (hermaphroditic phase) Style 5.5--11 mm long, exserting a few mm beyond anthers
Nectar clear
Herkogamy? Style exserting a few mm beyond anthers
Fruit color (at maturity) and size Fruits 3--5 mm in diameter, orange. Calyx (fruiting) stellate, small: lobe radius 3--5 mm, sinus radius 1.8--2.7 mm (isotype)
Seeds  
Chromosome number


Infructescence to 13 fruited (isotype).

J. cajamarca is distributed in northern Peru, Department Cajamarca, prov. Contumazá. Its habitat is roadsides and hillsides with shrubs between 1,700 and 2,600 meters.

Flowering and fruiting occurs from March through June.

The fruits are eaten (Sagástegui 10315, 12546, 13050, 14121) and the local name is "canamuela" (Sagástegui 10315, 12546, 13050, 14121).

Other Specimens Examined. PERU. Dept. CAJAMARCA, prov. Contumazá:
Yetón-Guzmango, 29 Apr. 1982, A. Sagástegui A. et al. 10315 (HUT MO);
Andaloy (San Benito-Yetón), 28 Mar. 1985, A. Sagástegui A. & S. Leiva G. 12546 (F);
Andaloy (San Benito-Yetón), 23 Mar. 1988, A. Sagástegui A. et al. 13050 (F HUT);
La Pampa (Guzmango), 7 May 1989, A. Sagástegui A. 14121 (F HUT);
Yetón (San Benito-Guzmango), 7 Apr. 1990, A. Sagástegui A. & C. Sagástegui C. 14254 (F);
El Chorrillo (Cascas - Contumazá), 16 June 1994, A. Sagástegui A. et al. 15301 (F).
Roadside Contumaza to Cascas, 22 Mar 2007, Leiva, Mione & Yacher 3657 (HAO).

Reproductive Biology. Plants grown in Connecticut from seeds of the type collection (grown as Mione 537) did not set fruit following six manual self-pollinations, nor were fruits set from six interplant pollinations involving three different plants. It is possible that this lack of fruit-set was due to suboptimal growing conditions. Thus, no conclusion has been made about stigma compatibility of J. cajamarca.

I thank Segundo Leiva G. for bringing me to populations of this species during our field work together.

Jaltomata cajamarca Mione (Novon 6: 280-284. 1996)
to Jaltomata home page
The information on this page may be cited as a communication with professor Thomas Mione,
Central Connecticut State University, Biology Department, Copernicus Hall, 1615 Stanley Street, New Britain, Connecticut 06050-4010, United States of America.