No. Lr Mobile can only use Smart Previews generated in Lightroom.
Lightroom 5 supports file formats including raw images from virtually any DSLR camera, JPEG, and PNG files. Lightroom5 creates and syncs Smart Previews between your desktop and mobile device. Smart Previews are representations of your original images that allow you to make non-destructive edits that can be synced back to your originals. The original files remain on your desktop and are not stored, synced, or used by Lightroom mobile. Camera roll files on your mobile device are natively supported and are synchronized to Lightroom 5".
At this time Lightroom mobile does not support direct import from an SD card, Raw or JPEG. If you can get your JPEGs into Camera Roll, Lightroom mobile will import them.